253032240 has 40 divisors (see below), whose sum is σ = 784400688. Its totient is φ = 67475200.

The previous prime is 253032239. The next prime is 253032271. The reversal of 253032240 is 42230352.

It is a tau number, because it is divible by the number of its divisors (40).

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, 526911 + ... + 527390.

Almost surely, 2^253032240 is an apocalyptic number.

253032240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253032240 is an abundant number, since it is smaller than the sum of its proper divisors (531368448).

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

253032240 is a wasteful number, since it uses less digits than its factorization.

253032240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054317 (or 1054311 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 253032240 is about 15906.9871440194. The cubic root of 253032240 is about 632.4972186081.

Adding to 253032240 its reverse (42230352), we get a palindrome (295262592).

The spelling of 253032240 in words is "two hundred fifty-three million, thirty-two thousand, two hundred forty".