861764922 has 12 divisors (see below), whose sum is σ = 1867157370. Its totient is φ = 287254968.

The previous prime is 861764857. The next prime is 861764951. The reversal of 861764922 is 229467168.

It is a happy number.

861764922 is a `hidden beast` number, since 8 + 617 + 6 + 4 + 9 + 22 = 666.

It can be written as a sum of positive squares in only one way, i.e., 572118561 + 289646361 = 23919^2 + 17019^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23937897 + ... + 23937932.

Almost surely, 2^861764922 is an apocalyptic number.

861764922 is an abundant number, since it is smaller than the sum of its proper divisors (1005392448).

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

861764922 is a wasteful number, since it uses less digits than its factorization.

861764922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47875837 (or 47875834 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 861764922 is about 29355.8328445984. The cubic root of 861764922 is about 951.6186337322.

The spelling of 861764922 in words is "eight hundred sixty-one million, seven hundred sixty-four thousand, nine hundred twenty-two".