913580820 has 72 divisors (see below), whose sum is σ = 2773854720. Its totient is φ = 243387840.

The previous prime is 913580809. The next prime is 913580879. The reversal of 913580820 is 28085319.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 270301 + ... + 273659.

It is an arithmetic number, because the mean of its divisors is an integer number (38525760).

Almost surely, 2^913580820 is an apocalyptic number.

913580820 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

913580820 is an abundant number, since it is smaller than the sum of its proper divisors (1860273900).

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

913580820 is a wasteful number, since it uses less digits than its factorization.

913580820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4885 (or 4880 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 913580820 is about 30225.4994995947. The cubic root of 913580820 is about 970.3215074817.

The spelling of 913580820 in words is "nine hundred thirteen million, five hundred eighty thousand, eight hundred twenty".