79646440 has 32 divisors (see below), whose sum is σ = 184988160. Its totient is φ = 30830400.

The previous prime is 79646407. The next prime is 79646443. The reversal of 79646440 is 4464697.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 79646393 and 79646402.

It is not an unprimeable number, because it can be changed into a prime (79646443) 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, 30876 + ... + 33355.

It is an arithmetic number, because the mean of its divisors is an integer number (5780880).

Almost surely, 2^79646440 is an apocalyptic number.

It is an amenable number.

79646440 is an abundant number, since it is smaller than the sum of its proper divisors (105341720).

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

79646440 is a wasteful number, since it uses less digits than its factorization.

79646440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64273 (or 64269 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 79646440 is about 8924.4854193393. The cubic root of 79646440 is about 430.2512323100.

The spelling of 79646440 in words is "seventy-nine million, six hundred forty-six thousand, four hundred forty".