400897212 has 48 divisors (see below), whose sum is σ = 955342080. Its totient is φ = 130807168.

The previous prime is 400897201. The next prime is 400897243. The reversal of 400897212 is 212798004.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185128 + ... + 187280.

It is an arithmetic number, because the mean of its divisors is an integer number (19902960).

Almost surely, 2^400897212 is an apocalyptic number.

It is an amenable number.

400897212 is an abundant number, since it is smaller than the sum of its proper divisors (554444868).

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

400897212 is a wasteful number, since it uses less digits than its factorization.

400897212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2482 (or 2480 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 400897212 is about 20022.4177361277. The cubic root of 400897212 is about 737.3567812290.

The spelling of 400897212 in words is "four hundred million, eight hundred ninety-seven thousand, two hundred twelve".