256393488 has 80 divisors (see below), whose sum is σ = 716579136. Its totient is φ = 78528000.

The previous prime is 256393469. The next prime is 256393499. The reversal of 256393488 is 884393652.

256393488 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×256393488² = 131475241377612288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155806 + ... + 157442.

Almost surely, 2^256393488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256393488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (358289568).

256393488 is an abundant number, since it is smaller than the sum of its proper divisors (460185648).

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

256393488 is a wasteful number, since it uses less digits than its factorization.

256393488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1912 (or 1906 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 48.

The square root of 256393488 is about 16012.2917785057. The cubic root of 256393488 is about 635.2855788653.

The spelling of 256393488 in words is "two hundred fifty-six million, three hundred ninety-three thousand, four hundred eighty-eight".