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78010481 = 101772381
BaseRepresentation
bin1001010011001…
…01100001110001
312102210100021002
410221211201301
5124432313411
611424011345
71635035543
oct451454161
9172710232
1078010481
114004247a
1222160b55
1313214963
14a509693
156cae33b
hex4a65871

78010481 has 4 divisors (see below), whose sum is σ = 78782964. Its totient is φ = 77238000.

The previous prime is 78010451. The next prime is 78010483. The reversal of 78010481 is 18401087.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18401087 = 41448807.

It can be written as a sum of positive squares in 2 ways, for example, as 60202081 + 17808400 = 7759^2 + 4220^2 .

It is a cyclic number.

It is not a de Polignac number, because 78010481 - 26 = 78010417 is a prime.

It is a super-2 number, since 2×780104812 = 12171270291702722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78010483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 386090 + ... + 386291.

It is an arithmetic number, because the mean of its divisors is an integer number (19695741).

Almost surely, 278010481 is an apocalyptic number.

It is an amenable number.

78010481 is a deficient number, since it is larger than the sum of its proper divisors (772483).

78010481 is a wasteful number, since it uses less digits than its factorization.

78010481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772482.

The product of its (nonzero) digits is 1792, while the sum is 29.

The square root of 78010481 is about 8832.3542161759. The cubic root of 78010481 is about 427.2850048065.

The spelling of 78010481 in words is "seventy-eight million, ten thousand, four hundred eighty-one".

Divisors: 1 101 772381 78010481