79994040 has 64 divisors (see below), whose sum is σ = 274268160. Its totient is φ = 18284160.

The previous prime is 79994039. The next prime is 79994041. The reversal of 79994040 is 4049997.

It is an interprime number because it is at equal distance from previous prime (79994039) and next prime (79994041).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 79993983 and 79994001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79994041) 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, 46776 + ... + 48455.

It is an arithmetic number, because the mean of its divisors is an integer number (4285440).

Almost surely, 2^79994040 is an apocalyptic number.

79994040 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

79994040 is an abundant number, since it is smaller than the sum of its proper divisors (194274120).

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

79994040 is a wasteful number, since it uses less digits than its factorization.

79994040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95252 (or 95248 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 79994040 is about 8943.9387296649. The cubic root of 79994040 is about 430.8762373817.

The spelling of 79994040 in words is "seventy-nine million, nine hundred ninety-four thousand, forty".