79645680 has 240 divisors, whose sum is σ = 294918624. Its totient is φ = 19906560.

The previous prime is 79645669. The next prime is 79645703. The reversal of 79645680 is 8654697.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 330360 + ... + 330600.

Almost surely, 2^79645680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79645680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147459312).

79645680 is an abundant number, since it is smaller than the sum of its proper divisors (215272944).

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

79645680 is a wasteful number, since it uses less digits than its factorization.

79645680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 79645680 is about 8924.4428397520. The cubic root of 79645680 is about 430.2498637953.

The spelling of 79645680 in words is "seventy-nine million, six hundred forty-five thousand, six hundred eighty".