253556420 has 24 divisors (see below), whose sum is σ = 573428184. Its totient is φ = 93620736.

The previous prime is 253556417. The next prime is 253556467. The reversal of 253556420 is 24655352.

It can be written as a sum of positive squares in 4 ways, for example, as 4674244 + 248882176 = 2162^2 + 15776^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 487349 + ... + 487868.

It is an arithmetic number, because the mean of its divisors is an integer number (23892841).

Almost surely, 2^253556420 is an apocalyptic number.

253556420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253556420 is an abundant number, since it is smaller than the sum of its proper divisors (319871764).

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

253556420 is a wasteful number, since it uses less digits than its factorization.

253556420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975239 (or 975237 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 32.

The square root of 253556420 is about 15923.4550270976. The cubic root of 253556420 is about 632.9336764481.

The spelling of 253556420 in words is "two hundred fifty-three million, five hundred fifty-six thousand, four hundred twenty".