400310442 has 24 divisors (see below), whose sum is σ = 991245216. Its totient is φ = 114374376.

The previous prime is 400310419. The next prime is 400310473. The reversal of 400310442 is 244013004.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1588408 + ... + 1588659.

It is an arithmetic number, because the mean of its divisors is an integer number (41301884).

Almost surely, 2^400310442 is an apocalyptic number.

400310442 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

400310442 is an abundant number, since it is smaller than the sum of its proper divisors (590934774).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400310442 is a wasteful number, since it uses less digits than its factorization.

400310442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3177082 (or 3177079 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 400310442 is about 20007.7595447366. The cubic root of 400310442 is about 736.9968634552.

Adding to 400310442 its reverse (244013004), we get a palindrome (644323446).

The spelling of 400310442 in words is "four hundred million, three hundred ten thousand, four hundred forty-two".