253345990 has 16 divisors (see below), whose sum is σ = 456354000. Its totient is φ = 101264800.

The previous prime is 253345979. The next prime is 253345991. The reversal of 253345990 is 99543352.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253345991) 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, 6540 + ... + 23440.

It is an arithmetic number, because the mean of its divisors is an integer number (28522125).

Almost surely, 2^253345990 is an apocalyptic number.

253345990 is a deficient number, since it is larger than the sum of its proper divisors (203008010).

253345990 is a wasteful number, since it uses less digits than its factorization.

253345990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18407.

The product of its (nonzero) digits is 145800, while the sum is 40.

The square root of 253345990 is about 15916.8461071910. The cubic root of 253345990 is about 632.7585345008.

The spelling of 253345990 in words is "two hundred fifty-three million, three hundred forty-five thousand, nine hundred ninety".