400340100 has 36 divisors (see below), whose sum is σ = 1158318224. Its totient is φ = 106757280.

The previous prime is 400340077. The next prime is 400340119. The reversal of 400340100 is 1043004.

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 666934 + ... + 667533.

Almost surely, 2^400340100 is an apocalyptic number.

It is an amenable number.

400340100 is an abundant number, since it is smaller than the sum of its proper divisors (757978124).

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

400340100 is a wasteful number, since it uses less digits than its factorization.

400340100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334484 (or 1334477 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 400340100 is about 20008.5006934553. The cubic root of 400340100 is about 737.0150637575.

Adding to 400340100 its reverse (1043004), we get a palindrome (401383104).

The spelling of 400340100 in words is "four hundred million, three hundred forty thousand, one hundred".