256485072 has 80 divisors (see below), whose sum is σ = 691400192. Its totient is φ = 81838080.

The previous prime is 256485071. The next prime is 256485101. The reversal of 256485072 is 270584652.

256485072 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 256485072.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256485071) 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, 143448 + ... + 145224.

Almost surely, 2^256485072 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 256485072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (345700096).

256485072 is an abundant number, since it is smaller than the sum of its proper divisors (434915120).

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

256485072 is a wasteful number, since it uses less digits than its factorization.

256485072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1916 (or 1910 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 39.

The square root of 256485072 is about 16015.1513261661. The cubic root of 256485072 is about 635.3612114002.

The spelling of 256485072 in words is "two hundred fifty-six million, four hundred eighty-five thousand, seventy-two".