240728256 has 42 divisors (see below), whose sum is σ = 690005732. Its totient is φ = 80242560.

The previous prime is 240728251. The next prime is 240728263. The reversal of 240728256 is 652827042.

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

It is a self number, because there is not a number n which added to its sum of digits gives 240728256.

It is not an unprimeable number, because it can be changed into a prime (240728251) 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, 208390 + ... + 209541.

Almost surely, 2^240728256 is an apocalyptic number.

It is an amenable number.

240728256 is an abundant number, since it is smaller than the sum of its proper divisors (449277476).

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

240728256 is a wasteful number, since it uses less digits than its factorization.

240728256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417949 (or 417936 counting only the distinct ones).

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

The square root of 240728256 is about 15515.4199427537. The cubic root of 240728256 is about 622.0744389014.

The spelling of 240728256 in words is "two hundred forty million, seven hundred twenty-eight thousand, two hundred fifty-six".