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78057294 = 2372733637
BaseRepresentation
bin1001010011100…
…00111101001110
312102212201110220
410221300331032
5124440313134
611425012210
71635322200
oct451607516
9172781426
1078057294
1140074667
1222184066
1313230063
14a51c770
156cbd149
hex4a70f4e

78057294 has 48 divisors (see below), whose sum is σ = 184141008. Its totient is φ = 21990528.

The previous prime is 78057289. The next prime is 78057313. The reversal of 78057294 is 49275087.

It is a super-2 number, since 2×780572942 = 12185882293204872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19644 + ... + 23280.

It is an arithmetic number, because the mean of its divisors is an integer number (3836271).

Almost surely, 278057294 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78057294, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92070504).

78057294 is an abundant number, since it is smaller than the sum of its proper divisors (106083714).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78057294 is a wasteful number, since it uses less digits than its factorization.

78057294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3729 (or 3722 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 78057294 is about 8835.0039049227. The cubic root of 78057294 is about 427.3704569703.

The spelling of 78057294 in words is "seventy-eight million, fifty-seven thousand, two hundred ninety-four".

Divisors: 1 2 3 6 7 14 21 42 49 73 98 146 147 219 294 438 511 1022 1533 3066 3577 3637 7154 7274 10731 10911 21462 21822 25459 50918 76377 152754 178213 265501 356426 531002 534639 796503 1069278 1593006 1858507 3717014 5575521 11151042 13009549 26019098 39028647 78057294