400562643 has 16 divisors (see below), whose sum is σ = 578501280. Its totient is φ = 245071104.

The previous prime is 400562639. The next prime is 400562647. The reversal of 400562643 is 346265004.

It is an interprime number because it is at equal distance from previous prime (400562639) and next prime (400562647).

It is not a de Polignac number, because 400562643 - 2² = 400562639 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400562643.

It is not an unprimeable number, because it can be changed into a prime (400562647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22938 + ... + 36431.

It is an arithmetic number, because the mean of its divisors is an integer number (36156330).

Almost surely, 2^400562643 is an apocalyptic number.

400562643 is a deficient number, since it is larger than the sum of its proper divisors (177938637).

400562643 is a wasteful number, since it uses less digits than its factorization.

400562643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59558.

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 400562643 is about 20014.0611321141. The cubic root of 400562643 is about 737.1516036320.

The spelling of 400562643 in words is "four hundred million, five hundred sixty-two thousand, six hundred forty-three".