256048440 has 64 divisors (see below), whose sum is σ = 769197600. Its totient is φ = 68186112.

The previous prime is 256048423. The next prime is 256048447. The reversal of 256048440 is 44840652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256048447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171216 + ... + 172704.

Almost surely, 2^256048440 is an apocalyptic number.

256048440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256048440 is an abundant number, since it is smaller than the sum of its proper divisors (513149160).

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

256048440 is a wasteful number, since it uses less digits than its factorization.

256048440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2936 (or 2932 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 33.

The square root of 256048440 is about 16001.5136783993. The cubic root of 256048440 is about 635.0004670673. Note that the first 3 decimals are identical.

The spelling of 256048440 in words is "two hundred fifty-six million, forty-eight thousand, four hundred forty".