256740084 has 48 divisors (see below), whose sum is σ = 700660800. Its totient is φ = 81075168.

The previous prime is 256740083. The next prime is 256740091. The reversal of 256740084 is 480047652.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256740083) 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, 60507 + ... + 64610.

It is an arithmetic number, because the mean of its divisors is an integer number (14597100).

Almost surely, 2^256740084 is an apocalyptic number.

It is an amenable number.

256740084 is an abundant number, since it is smaller than the sum of its proper divisors (443920716).

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

256740084 is a wasteful number, since it uses less digits than its factorization.

256740084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125149 (or 125141 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 256740084 is about 16023.1109338979. The cubic root of 256740084 is about 635.5717123643.

The spelling of 256740084 in words is "two hundred fifty-six million, seven hundred forty thousand, eighty-four".