253440668 has 12 divisors (see below), whose sum is σ = 477638280. Its totient is φ = 116972592.

The previous prime is 253440653. The next prime is 253440679. The reversal of 253440668 is 866044352.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2436878 + ... + 2436981.

It is an arithmetic number, because the mean of its divisors is an integer number (39803190).

Almost surely, 2^253440668 is an apocalyptic number.

It is an amenable number.

253440668 is a deficient number, since it is larger than the sum of its proper divisors (224197612).

253440668 is a wasteful number, since it uses less digits than its factorization.

253440668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4873876 (or 4873874 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 38.

The square root of 253440668 is about 15919.8199738565. The cubic root of 253440668 is about 632.8373474729.

The spelling of 253440668 in words is "two hundred fifty-three million, four hundred forty thousand, six hundred sixty-eight".