253057690 has 8 divisors (see below), whose sum is σ = 455503860. Its totient is φ = 101223072.

The previous prime is 253057687. The next prime is 253057691. The reversal of 253057690 is 96750352.

It can be written as a sum of positive squares in 2 ways, for example, as 244015641 + 9042049 = 15621^2 + 3007^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×253057690² = 128076388936272200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (253057691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12652875 + ... + 12652894.

Almost surely, 2^253057690 is an apocalyptic number.

253057690 is a deficient number, since it is larger than the sum of its proper divisors (202446170).

253057690 is a wasteful number, since it uses less digits than its factorization.

253057690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25305776.

The product of its (nonzero) digits is 56700, while the sum is 37.

The square root of 253057690 is about 15907.7870868327. The cubic root of 253057690 is about 632.5184234350.

The spelling of 253057690 in words is "two hundred fifty-three million, fifty-seven thousand, six hundred ninety".