256341772 has 12 divisors (see below), whose sum is σ = 460722640. Its totient is φ = 124706736.

The previous prime is 256341769. The next prime is 256341779. The reversal of 256341772 is 277143652.

It is a happy number.

It is a super-2 number, since 2×256341772² = 131422208144199968, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (256341779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 865872 + ... + 866167.

Almost surely, 2^256341772 is an apocalyptic number.

It is an amenable number.

256341772 is a deficient number, since it is larger than the sum of its proper divisors (204380868).

256341772 is a wasteful number, since it uses less digits than its factorization.

256341772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1732080 (or 1732078 counting only the distinct ones).

The product of its digits is 70560, while the sum is 37.

The square root of 256341772 is about 16010.6768126772. The cubic root of 256341772 is about 635.2428624421.

The spelling of 256341772 in words is "two hundred fifty-six million, three hundred forty-one thousand, seven hundred seventy-two".