256907616 has 48 divisors (see below), whose sum is σ = 770724864. Its totient is φ = 73401984.

The previous prime is 256907603. The next prime is 256907617. The reversal of 256907616 is 616709652.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256907617) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 190480 + ... + 191823.

It is an arithmetic number, because the mean of its divisors is an integer number (16056768).

Almost surely, 2^256907616 is an apocalyptic number.

It is an amenable number.

256907616 is an abundant number, since it is smaller than the sum of its proper divisors (513817248).

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

256907616 is a wasteful number, since it uses less digits than its factorization.

256907616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382323 (or 382315 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 256907616 is about 16028.3379050980. The cubic root of 256907616 is about 635.7099266581.

The spelling of 256907616 in words is "two hundred fifty-six million, nine hundred seven thousand, six hundred sixteen".