79897824 has 72 divisors (see below), whose sum is σ = 240589440. Its totient is φ = 25064448.

The previous prime is 79897799. The next prime is 79897847. The reversal of 79897824 is 42879897.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3264 + ... + 13055.

It is an arithmetic number, because the mean of its divisors is an integer number (3341520).

Almost surely, 2^79897824 is an apocalyptic number.

It is an amenable number.

79897824 is an abundant number, since it is smaller than the sum of its proper divisors (160691616).

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

79897824 is a wasteful number, since it uses less digits than its factorization.

79897824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16352 (or 16341 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 54.

The square root of 79897824 is about 8938.5582730103. The cubic root of 79897824 is about 430.7034169207.

The spelling of 79897824 in words is "seventy-nine million, eight hundred ninety-seven thousand, eight hundred twenty-four".