400996689 has 8 divisors (see below), whose sum is σ = 534756672. Its totient is φ = 267283920.

The previous prime is 400996667. The next prime is 400996699. The reversal of 400996689 is 986699004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 400996689 - 2¹⁷ = 400865617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400996619) 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, 21207 + ... + 35379.

It is an arithmetic number, because the mean of its divisors is an integer number (66844584).

Almost surely, 2^400996689 is an apocalyptic number.

It is an amenable number.

400996689 is a deficient number, since it is larger than the sum of its proper divisors (133759983).

400996689 is a wasteful number, since it uses less digits than its factorization.

400996689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23607.

The product of its (nonzero) digits is 839808, while the sum is 51.

The square root of 400996689 is about 20024.9017226053. The cubic root of 400996689 is about 737.4177644206.

The spelling of 400996689 in words is "four hundred million, nine hundred ninety-six thousand, six hundred eighty-nine".