400386316 has 24 divisors (see below), whose sum is σ = 804605760. Its totient is φ = 172414800.

The previous prime is 400386293. The next prime is 400386317. The reversal of 400386316 is 613683004.

It is not an unprimeable number, because it can be changed into a prime (400386317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 238630 + ... + 240301.

It is an arithmetic number, because the mean of its divisors is an integer number (33525240).

Almost surely, 2^400386316 is an apocalyptic number.

It is an amenable number.

400386316 is an abundant number, since it is smaller than the sum of its proper divisors (404219444).

400386316 is a wasteful number, since it uses less digits than its factorization.

400386316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478965 (or 478963 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 400386316 is about 20009.6555692496. The cubic root of 400386316 is about 737.0434234593.

The spelling of 400386316 in words is "four hundred million, three hundred eighty-six thousand, three hundred sixteen".