256301840 has 20 divisors (see below), whose sum is σ = 595901964. Its totient is φ = 102520704.

The previous prime is 256301821. The next prime is 256301861. The reversal of 256301840 is 48103652.

256301840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 192876544 + 63425296 = 13888^2 + 7964^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1601807 + ... + 1601966.

Almost surely, 2^256301840 is an apocalyptic number.

256301840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256301840 is an abundant number, since it is smaller than the sum of its proper divisors (339600124).

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

256301840 is a wasteful number, since it uses less digits than its factorization.

256301840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3203786 (or 3203780 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 256301840 is about 16009.4297212612. The cubic root of 256301840 is about 635.2098754458.

The spelling of 256301840 in words is "two hundred fifty-six million, three hundred one thousand, eight hundred forty".