400947912 has 24 divisors (see below), whose sum is σ = 1085900790. Its totient is φ = 133649280.

The previous prime is 400947887. The next prime is 400947917. The reversal of 400947912 is 219749004.

It can be written as a sum of positive squares in only one way, i.e., 245047716 + 155900196 = 15654^2 + 12486^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (400947917) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2784289 + ... + 2784432.

Almost surely, 2^400947912 is an apocalyptic number.

It is an amenable number.

400947912 is an abundant number, since it is smaller than the sum of its proper divisors (684952878).

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

400947912 is a wasteful number, since it uses less digits than its factorization.

400947912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5568733 (or 5568726 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 400947912 is about 20023.6837769677. The cubic root of 400947912 is about 737.3878635213.

The spelling of 400947912 in words is "four hundred million, nine hundred forty-seven thousand, nine hundred twelve".