400983988 has 24 divisors (see below), whose sum is σ = 714891744. Its totient is φ = 196744800.

The previous prime is 400983983. The next prime is 400983991. The reversal of 400983988 is 889389004.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400983983) by changing a digit.

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, 118131 + ... + 121477.

It is an arithmetic number, because the mean of its divisors is an integer number (29787156).

Almost surely, 2^400983988 is an apocalyptic number.

It is an amenable number.

400983988 is a deficient number, since it is larger than the sum of its proper divisors (313907756).

400983988 is a wasteful number, since it uses less digits than its factorization.

400983988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3903 (or 3901 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 49.

The square root of 400983988 is about 20024.5845899484. The cubic root of 400983988 is about 737.4099787853.

The spelling of 400983988 in words is "four hundred million, nine hundred eighty-three thousand, nine hundred eighty-eight".