79155920 has 40 divisors (see below), whose sum is σ = 184407840. Its totient is φ = 31598720.

The previous prime is 79155917. The next prime is 79155929. The reversal of 79155920 is 2955197.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79155929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77171 + ... + 78189.

It is an arithmetic number, because the mean of its divisors is an integer number (4610196).

Almost surely, 2^79155920 is an apocalyptic number.

It is an amenable number.

79155920 is an abundant number, since it is smaller than the sum of its proper divisors (105251920).

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

79155920 is a wasteful number, since it uses less digits than its factorization.

79155920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2003 (or 1997 counting only the distinct ones).

The product of its (nonzero) digits is 28350, while the sum is 38.

The square root of 79155920 is about 8896.9612789986. The cubic root of 79155920 is about 429.3661474176.

The spelling of 79155920 in words is "seventy-nine million, one hundred fifty-five thousand, nine hundred twenty".