612857644 has 12 divisors (see below), whose sum is σ = 1225715344. Its totient is φ = 262653264.

The previous prime is 612857639. The next prime is 612857657. The reversal of 612857644 is 446758216.

612857644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

612857644 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 612857644.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10943859 + ... + 10943914.

Almost surely, 2^612857644 is an apocalyptic number.

It is an amenable number.

612857644 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

612857644 is a wasteful number, since it uses less digits than its factorization.

612857644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21887784 (or 21887782 counting only the distinct ones).

The product of its digits is 322560, while the sum is 43.

The square root of 612857644 is about 24755.9617870120. The cubic root of 612857644 is about 849.4148886710.

The spelling of 612857644 in words is "six hundred twelve million, eight hundred fifty-seven thousand, six hundred forty-four".