400431250 has 48 divisors (see below), whose sum is σ = 761201280. Its totient is φ = 157950000.

The previous prime is 400431233. The next prime is 400431257. The reversal of 400431250 is 52134004.

It is not an unprimeable number, because it can be changed into a prime (400431257) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 493345 + ... + 494155.

It is an arithmetic number, because the mean of its divisors is an integer number (15858360).

Almost surely, 2^400431250 is an apocalyptic number.

400431250 is a deficient number, since it is larger than the sum of its proper divisors (360770030).

400431250 is an frugal number, since it uses more digits than its factorization.

400431250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917 (or 897 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 400431250 is about 20010.7783456816. The cubic root of 400431250 is about 737.0709943902.

Adding to 400431250 its reverse (52134004), we get a palindrome (452565254).

The spelling of 400431250 in words is "four hundred million, four hundred thirty-one thousand, two hundred fifty".