400616402 has 24 divisors (see below), whose sum is σ = 618905700. Its totient is φ = 194434560.

The previous prime is 400616393. The next prime is 400616459. The reversal of 400616402 is 204616004.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 110901961 + 289714441 = 10531^2 + 17021^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1147724 + ... + 1148072.

Almost surely, 2^400616402 is an apocalyptic number.

400616402 is a deficient number, since it is larger than the sum of its proper divisors (218289298).

400616402 is an equidigital number, since it uses as much as digits as its factorization.

400616402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606 (or 509 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 400616402 is about 20015.4041178288. The cubic root of 400616402 is about 737.1845795482.

The spelling of 400616402 in words is "four hundred million, six hundred sixteen thousand, four hundred two".