400323400 has 24 divisors (see below), whose sum is σ = 930752370. Its totient is φ = 160129280.

The previous prime is 400323397. The next prime is 400323433. The reversal of 400323400 is 4323004.

It can be written as a sum of positive squares in 3 ways, for example, as 346183236 + 54140164 = 18606^2 + 7358^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1000609 + ... + 1001008.

Almost surely, 2^400323400 is an apocalyptic number.

400323400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400323400 is an abundant number, since it is smaller than the sum of its proper divisors (530428970).

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

400323400 is a wasteful number, since it uses less digits than its factorization.

400323400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2001633 (or 2001624 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 400323400 is about 20008.0833664797. The cubic root of 400323400 is about 737.0048155355.

Adding to 400323400 its reverse (4323004), we get a palindrome (404646404).

The spelling of 400323400 in words is "four hundred million, three hundred twenty-three thousand, four hundred".