400431300 has 36 divisors (see below), whose sum is σ = 1158582096. Its totient is φ = 106781600.

The previous prime is 400431293. The next prime is 400431301. The reversal of 400431300 is 3134004.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 400431300.

It is not an unprimeable number, because it can be changed into a prime (400431301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 667086 + ... + 667685.

It is an arithmetic number, because the mean of its divisors is an integer number (32182836).

Almost surely, 2^400431300 is an apocalyptic number.

It is an amenable number.

400431300 is an abundant number, since it is smaller than the sum of its proper divisors (758150796).

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

400431300 is a wasteful number, since it uses less digits than its factorization.

400431300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334788 (or 1334781 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 400431300 is about 20010.7795950083. The cubic root of 400431300 is about 737.0710250684.

Adding to 400431300 its reverse (3134004), we get a palindrome (403565304).

The spelling of 400431300 in words is "four hundred million, four hundred thirty-one thousand, three hundred".