79425440 has 96 divisors (see below), whose sum is σ = 198567936. Its totient is φ = 29962240.

The previous prime is 79425433. The next prime is 79425449. The reversal of 79425440 is 4452497.

It is a self number, because there is not a number n which added to its sum of digits gives 79425440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79425449) 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, 415745 + ... + 415935.

It is an arithmetic number, because the mean of its divisors is an integer number (2068416).

Almost surely, 2^79425440 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 79425440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99283968).

79425440 is an abundant number, since it is smaller than the sum of its proper divisors (119142496).

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

79425440 is a wasteful number, since it uses less digits than its factorization.

79425440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342 (or 334 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 79425440 is about 8912.0951520953. The cubic root of 79425440 is about 429.8529152613.

The spelling of 79425440 in words is "seventy-nine million, four hundred twenty-five thousand, four hundred forty".