400653442 has 32 divisors (see below), whose sum is σ = 694241280. Its totient is φ = 169869120.

The previous prime is 400653431. The next prime is 400653443. The reversal of 400653442 is 244356004.

It is a self number, because there is not a number n which added to its sum of digits gives 400653442.

It is not an unprimeable number, because it can be changed into a prime (400653443) 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, 719028 + ... + 719584.

It is an arithmetic number, because the mean of its divisors is an integer number (21695040).

Almost surely, 2^400653442 is an apocalyptic number.

400653442 is a deficient number, since it is larger than the sum of its proper divisors (293587838).

400653442 is a wasteful number, since it uses less digits than its factorization.

400653442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026.

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 400653442 is about 20016.3293837806. The cubic root of 400653442 is about 737.2072982680.

The spelling of 400653442 in words is "four hundred million, six hundred fifty-three thousand, four hundred forty-two".