400570690 has 16 divisors (see below), whose sum is σ = 776491128. Its totient is φ = 147902976.

The previous prime is 400570631. The next prime is 400570717. The reversal of 400570690 is 96075004.

It can be written as a sum of positive squares in 4 ways, for example, as 344065401 + 56505289 = 18549^2 + 7517^2 .

It is a super-2 number, since 2×400570690² = 320913755374152200, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 1540527 + ... + 1540786.

Almost surely, 2^400570690 is an apocalyptic number.

400570690 is a deficient number, since it is larger than the sum of its proper divisors (375920438).

400570690 is a wasteful number, since it uses less digits than its factorization.

400570690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3081333.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 400570690 is about 20014.2621647664. The cubic root of 400570690 is about 737.1565398714.

The spelling of 400570690 in words is "four hundred million, five hundred seventy thousand, six hundred ninety".