256147760 has 40 divisors (see below), whose sum is σ = 649686096. Its totient is φ = 93144320.

The previous prime is 256147751. The next prime is 256147763. The reversal of 256147760 is 67741652.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×256147760² = 131223349906035200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256147763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144659 + ... + 146418.

Almost surely, 2^256147760 is an apocalyptic number.

256147760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256147760 is an abundant number, since it is smaller than the sum of its proper divisors (393538336).

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

256147760 is a wasteful number, since it uses less digits than its factorization.

256147760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291101 (or 291095 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 256147760 is about 16004.6168339014. The cubic root of 256147760 is about 635.0825610303.

The spelling of 256147760 in words is "two hundred fifty-six million, one hundred forty-seven thousand, seven hundred sixty".