253921390 has 16 divisors (see below), whose sum is σ = 472819680. Its totient is φ = 98066080.

The previous prime is 253921363. The next prime is 253921391. The reversal of 253921390 is 93129352.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253921391) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 437506 + ... + 438085.

It is an arithmetic number, because the mean of its divisors is an integer number (29551230).

Almost surely, 2^253921390 is an apocalyptic number.

253921390 is a deficient number, since it is larger than the sum of its proper divisors (218898290).

253921390 is a wasteful number, since it uses less digits than its factorization.

253921390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875627.

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 253921390 is about 15934.9110446215. The cubic root of 253921390 is about 633.2372131751.

The spelling of 253921390 in words is "two hundred fifty-three million, nine hundred twenty-one thousand, three hundred ninety".