617256492 has 12 divisors (see below), whose sum is σ = 1440265176. Its totient is φ = 205752160.

The previous prime is 617256487. The next prime is 617256509. The reversal of 617256492 is 294652716.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×617256492² = 762011153832292128, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25719009 + ... + 25719032.

It is an arithmetic number, because the mean of its divisors is an integer number (120022098).

Almost surely, 2^617256492 is an apocalyptic number.

It is an amenable number.

617256492 is an abundant number, since it is smaller than the sum of its proper divisors (823008684).

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

617256492 is a wasteful number, since it uses less digits than its factorization.

617256492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51438048 (or 51438046 counting only the distinct ones).

The product of its digits is 181440, while the sum is 42.

The square root of 617256492 is about 24844.6471498389. The cubic root of 617256492 is about 851.4422996161.

The spelling of 617256492 in words is "six hundred seventeen million, two hundred fifty-six thousand, four hundred ninety-two".