253400388 has 12 divisors (see below), whose sum is σ = 591267600. Its totient is φ = 84466792.

The previous prime is 253400311. The next prime is 253400393. The reversal of 253400388 is 883004352.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10558338 + ... + 10558361.

It is an arithmetic number, because the mean of its divisors is an integer number (49272300).

Almost surely, 2^253400388 is an apocalyptic number.

It is an amenable number.

253400388 is an abundant number, since it is smaller than the sum of its proper divisors (337867212).

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

253400388 is a wasteful number, since it uses less digits than its factorization.

253400388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21116706 (or 21116704 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 253400388 is about 15918.5548339037. The cubic root of 253400388 is about 632.8038195218.

The spelling of 253400388 in words is "two hundred fifty-three million, four hundred thousand, three hundred eighty-eight".