872661456 has 30 divisors (see below), whose sum is σ = 2442240450. Its totient is φ = 290887104.

The previous prime is 872661407. The next prime is 872661473. The reversal of 872661456 is 654166278.

872661456 is a `hidden beast` number, since 8 + 7 + 26 + 614 + 5 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 867891600 + 4769856 = 29460^2 + 2184^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3029931 + ... + 3030218.

It is an arithmetic number, because the mean of its divisors is an integer number (81408015).

Almost surely, 2^872661456 is an apocalyptic number.

It is an amenable number.

872661456 is an abundant number, since it is smaller than the sum of its proper divisors (1569578994).

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

872661456 is a wasteful number, since it uses less digits than its factorization.

872661456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6060163 (or 6060154 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 872661456 is about 29540.8438606618. The cubic root of 872661456 is about 955.6127409159.

The spelling of 872661456 in words is "eight hundred seventy-two million, six hundred sixty-one thousand, four hundred fifty-six".