253987390 has 16 divisors (see below), whose sum is σ = 477055008. Its totient is φ = 97177696.

The previous prime is 253987373. The next prime is 253987397. The reversal of 253987390 is 93789352.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a self number, because there is not a number n which added to its sum of digits gives 253987390.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253987397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 551917 + ... + 552376.

It is an arithmetic number, because the mean of its divisors is an integer number (29815938).

Almost surely, 2^253987390 is an apocalyptic number.

253987390 is a deficient number, since it is larger than the sum of its proper divisors (223067618).

253987390 is a wasteful number, since it uses less digits than its factorization.

253987390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1104323.

The product of its (nonzero) digits is 408240, while the sum is 46.

The square root of 253987390 is about 15936.9818347139. The cubic root of 253987390 is about 633.2920727198.

The spelling of 253987390 in words is "two hundred fifty-three million, nine hundred eighty-seven thousand, three hundred ninety".