79281520 has 40 divisors (see below), whose sum is σ = 184742640. Its totient is φ = 31641600.

The previous prime is 79281487. The next prime is 79281533. The reversal of 79281520 is 2518297.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48720 + ... + 50320.

It is an arithmetic number, because the mean of its divisors is an integer number (4618566).

Almost surely, 2^79281520 is an apocalyptic number.

It is an amenable number.

79281520 is an abundant number, since it is smaller than the sum of its proper divisors (105461120).

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

79281520 is a wasteful number, since it uses less digits than its factorization.

79281520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2233 (or 2227 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 79281520 is about 8904.0170709630. The cubic root of 79281520 is about 429.5931251334.

The spelling of 79281520 in words is "seventy-nine million, two hundred eighty-one thousand, five hundred twenty".