400402442 has 16 divisors (see below), whose sum is σ = 655539264. Its totient is φ = 181908000.

The previous prime is 400402403. The next prime is 400402459. The reversal of 400402442 is 244204004.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58142 + ... + 64662.

It is an arithmetic number, because the mean of its divisors is an integer number (40971204).

Almost surely, 2^400402442 is an apocalyptic number.

400402442 is a deficient number, since it is larger than the sum of its proper divisors (255136822).

400402442 is a wasteful number, since it uses less digits than its factorization.

400402442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9325.

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 400402442 is about 20010.0585206541. The cubic root of 400402442 is about 737.0533184051.

Adding to 400402442 its reverse (244204004), we get a palindrome (644606446).

The spelling of 400402442 in words is "four hundred million, four hundred two thousand, four hundred forty-two".