253731388 has 12 divisors (see below), whose sum is σ = 451556280. Its totient is φ = 124715312.

The previous prime is 253731371. The next prime is 253731403. The reversal of 253731388 is 883137352.

It is a self number, because there is not a number n which added to its sum of digits gives 253731388.

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, 537331 + ... + 537802.

It is an arithmetic number, because the mean of its divisors is an integer number (37629690).

Almost surely, 2^253731388 is an apocalyptic number.

It is an amenable number.

253731388 is a deficient number, since it is larger than the sum of its proper divisors (197824892).

253731388 is a wasteful number, since it uses less digits than its factorization.

253731388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075196 (or 1075194 counting only the distinct ones).

The product of its digits is 120960, while the sum is 40.

The square root of 253731388 is about 15928.9481134192. The cubic root of 253731388 is about 633.0792294264.

The spelling of 253731388 in words is "two hundred fifty-three million, seven hundred thirty-one thousand, three hundred eighty-eight".