785224660 has 36 divisors (see below), whose sum is σ = 1812511764. Its totient is φ = 285535360.

The previous prime is 785224651. The next prime is 785224691. The reversal of 785224660 is 66422587.

It can be written as a sum of positive squares in 2 ways, for example, as 578210116 + 207014544 = 24046^2 + 14388^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 159817 + ... + 164656.

It is an arithmetic number, because the mean of its divisors is an integer number (50347549).

Almost surely, 2^785224660 is an apocalyptic number.

It is an amenable number.

785224660 is an abundant number, since it is smaller than the sum of its proper divisors (1027287104).

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

785224660 is a wasteful number, since it uses less digits than its factorization.

785224660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324504 (or 324491 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 785224660 is about 28021.8603950559. The cubic root of 785224660 is about 922.5671291206.

The spelling of 785224660 in words is "seven hundred eighty-five million, two hundred twenty-four thousand, six hundred sixty".