256490946 has 12 divisors (see below), whose sum is σ = 555730422. Its totient is φ = 85496976.

The previous prime is 256490939. The next prime is 256490947. The reversal of 256490946 is 649094652.

It can be written as a sum of positive squares in only one way, i.e., 235284921 + 21206025 = 15339^2 + 4605^2 .

It is a super-3 number, since 3×256490946³ (a number of 26 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (256490947) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7124731 + ... + 7124766.

Almost surely, 2^256490946 is an apocalyptic number.

256490946 is an abundant number, since it is smaller than the sum of its proper divisors (299239476).

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

256490946 is a wasteful number, since it uses less digits than its factorization.

256490946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14249505 (or 14249502 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The square root of 256490946 is about 16015.3347139546. The cubic root of 256490946 is about 635.3660616932.

The spelling of 256490946 in words is "two hundred fifty-six million, four hundred ninety thousand, nine hundred forty-six".