253613340 has 36 divisors (see below), whose sum is σ = 769294344. Its totient is φ = 67630176.

The previous prime is 253613333. The next prime is 253613359. The reversal of 253613340 is 43316352.

It is a happy number.

253613340 is a `hidden beast` number, since 2 + 5 + 3 + 613 + 3 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 704302 + ... + 704661.

Almost surely, 2^253613340 is an apocalyptic number.

253613340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253613340 is an abundant number, since it is smaller than the sum of its proper divisors (515681004).

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

253613340 is a wasteful number, since it uses less digits than its factorization.

253613340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1408978 (or 1408973 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 253613340 is about 15925.2422273572. The cubic root of 253613340 is about 632.9810345987.

Adding to 253613340 its reverse (43316352), we get a palindrome (296929692).

It can be divided in two parts, 2536 and 13340, that added together give a square (15876 = 126²).

The spelling of 253613340 in words is "two hundred fifty-three million, six hundred thirteen thousand, three hundred forty".