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79782140 = 22519209953
BaseRepresentation
bin1001100000101…
…10000011111100
312120010100112002
410300112003330
5130411012030
611530001432
71656064664
oct460260374
9176110462
1079782140
1141042559
1222876278
13136b5189
14a84b1a4
15700e245
hex4c160fc

79782140 has 24 divisors (see below), whose sum is σ = 176361360. Its totient is φ = 30233088.

The previous prime is 79782137. The next prime is 79782151. The reversal of 79782140 is 4128797.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 79782094 and 79782103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104597 + ... + 105356.

It is an arithmetic number, because the mean of its divisors is an integer number (7348390).

Almost surely, 279782140 is an apocalyptic number.

It is an amenable number.

79782140 is an abundant number, since it is smaller than the sum of its proper divisors (96579220).

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

79782140 is a wasteful number, since it uses less digits than its factorization.

79782140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209981 (or 209979 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 79782140 is about 8932.0848630093. The cubic root of 79782140 is about 430.4954447951.

The spelling of 79782140 in words is "seventy-nine million, seven hundred eighty-two thousand, one hundred forty".

Divisors: 1 2 4 5 10 19 20 38 76 95 190 380 209953 419906 839812 1049765 2099530 3989107 4199060 7978214 15956428 19945535 39891070 79782140