79129020 has 48 divisors (see below), whose sum is σ = 222058368. Its totient is φ = 21053760.

The previous prime is 79129013. The next prime is 79129027. The reversal of 79129020 is 2092197.

It is an interprime number because it is at equal distance from previous prime (79129013) and next prime (79129027).

It is a super-2 number, since 2×79129020² = 12522803612320800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79129027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31615 + ... + 34025.

It is an arithmetic number, because the mean of its divisors is an integer number (4626216).

Almost surely, 2^79129020 is an apocalyptic number.

It is an amenable number.

79129020 is an abundant number, since it is smaller than the sum of its proper divisors (142929348).

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

79129020 is a wasteful number, since it uses less digits than its factorization.

79129020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2970 (or 2968 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 79129020 is about 8895.4493984284. The cubic root of 79129020 is about 429.3175039387.

The spelling of 79129020 in words is "seventy-nine million, one hundred twenty-nine thousand, twenty".