400397309464 has 16 divisors (see below), whose sum is σ = 750752058600. Its totient is φ = 200196760512.

The previous prime is 400397309423. The next prime is 400397309509. The reversal of 400397309464 is 464903793004.

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 3 ways as a sum of consecutive naturals, for example, 1116652 + ... + 1430980.

Almost surely, 2^400397309464 is an apocalyptic number.

It is an amenable number.

400397309464 is a deficient number, since it is larger than the sum of its proper divisors (350354749136).

400397309464 is a wasteful number, since it uses less digits than its factorization.

400397309464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473562 (or 473558 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 49.

The spelling of 400397309464 in words is "four hundred billion, three hundred ninety-seven million, three hundred nine thousand, four hundred sixty-four".