79825440 has 48 divisors (see below), whose sum is σ = 251451648. Its totient is φ = 21286656.

The previous prime is 79825439. The next prime is 79825453. The reversal of 79825440 is 4452897.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82672 + ... + 83631.

It is an arithmetic number, because the mean of its divisors is an integer number (5238576).

Almost surely, 2^79825440 is an apocalyptic number.

It is an amenable number.

79825440 is an abundant number, since it is smaller than the sum of its proper divisors (171626208).

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

79825440 is a wasteful number, since it uses less digits than its factorization.

79825440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166321 (or 166313 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 79825440 is about 8934.5083804315. The cubic root of 79825440 is about 430.5733113516.

The spelling of 79825440 in words is "seventy-nine million, eight hundred twenty-five thousand, four hundred forty".