79472640 has 192 divisors, whose sum is σ = 275184000. Its totient is φ = 19464192.

The previous prime is 79472581. The next prime is 79472677. The reversal of 79472640 is 4627497.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 399261 + ... + 399459.

It is an arithmetic number, because the mean of its divisors is an integer number (1433250).

Almost surely, 2^79472640 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 79472640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137592000).

79472640 is an abundant number, since it is smaller than the sum of its proper divisors (195711360).

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

79472640 is a wasteful number, since it uses less digits than its factorization.

79472640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242 (or 222 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 39.

The square root of 79472640 is about 8914.7428454218. The cubic root of 79472640 is about 429.9380476818.

The spelling of 79472640 in words is "seventy-nine million, four hundred seventy-two thousand, six hundred forty".