400881208 has 32 divisors (see below), whose sum is σ = 925112160. Its totient is φ = 158590080.

The previous prime is 400881197. The next prime is 400881251. The reversal of 400881208 is 802188004.

It is a self number, because there is not a number n which added to its sum of digits gives 400881208.

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 7 ways as a sum of consecutive naturals, for example, 274603 + ... + 276058.

It is an arithmetic number, because the mean of its divisors is an integer number (28909755).

Almost surely, 2^400881208 is an apocalyptic number.

It is an amenable number.

400881208 is an abundant number, since it is smaller than the sum of its proper divisors (524230952).

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

400881208 is a wasteful number, since it uses less digits than its factorization.

400881208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550687 (or 550683 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 31.

The square root of 400881208 is about 20022.0180801037. The cubic root of 400881208 is about 737.3469692251.

The spelling of 400881208 in words is "four hundred million, eight hundred eighty-one thousand, two hundred eight".