79742520 has 192 divisors, whose sum is σ = 304668000. Its totient is φ = 17832960.

The previous prime is 79742519. The next prime is 79742527. The reversal of 79742520 is 2524797.

79742520 is a `hidden beast` number, since 7 + 97 + 42 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79742527) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 50706 + ... + 52254.

Almost surely, 2^79742520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79742520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152334000).

79742520 is an abundant number, since it is smaller than the sum of its proper divisors (224925480).

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

79742520 is a wasteful number, since it uses less digits than its factorization.

79742520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1590 (or 1583 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 79742520 is about 8929.8667403271. The cubic root of 79742520 is about 430.4241713092.

The spelling of 79742520 in words is "seventy-nine million, seven hundred forty-two thousand, five hundred twenty".