79578840 has 192 divisors, whose sum is σ = 276514560. Its totient is φ = 18167040.

The previous prime is 79578839. The next prime is 79578881. The reversal of 79578840 is 4887597.

It is a self number, because there is not a number n which added to its sum of digits gives 79578840.

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, 476437 + ... + 476603.

It is an arithmetic number, because the mean of its divisors is an integer number (1440180).

Almost surely, 2^79578840 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 79578840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138257280).

79578840 is an abundant number, since it is smaller than the sum of its proper divisors (196935720).

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

79578840 is a wasteful number, since it uses less digits than its factorization.

79578840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230 (or 207 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 48.

The square root of 79578840 is about 8920.6972821635. The cubic root of 79578840 is about 430.1294724597.

The spelling of 79578840 in words is "seventy-nine million, five hundred seventy-eight thousand, eight hundred forty".