400668983 has 16 divisors (see below), whose sum is σ = 471284352. Its totient is φ = 335820000.

The previous prime is 400668977. The next prime is 400668991. The reversal of 400668983 is 389866004.

It is a cyclic number.

It is not a de Polignac number, because 400668983 - 2¹⁶ = 400603447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400668083) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206528 + ... + 208458.

It is an arithmetic number, because the mean of its divisors is an integer number (29455272).

Almost surely, 2^400668983 is an apocalyptic number.

400668983 is a deficient number, since it is larger than the sum of its proper divisors (70615369).

400668983 is a wasteful number, since it uses less digits than its factorization.

400668983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3406.

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 400668983 is about 20016.7175880562. The cubic root of 400668983 is about 737.2168300223.

The spelling of 400668983 in words is "four hundred million, six hundred sixty-eight thousand, nine hundred eighty-three".