400516317 has 6 divisors (see below), whose sum is σ = 578523582. Its totient is φ = 267010872.

The previous prime is 400516313. The next prime is 400516327. The reversal of 400516317 is 713615004.

It can be written as a sum of positive squares in only one way, i.e., 369446841 + 31069476 = 19221^2 + 5574^2 .

It is not a de Polignac number, because 400516317 - 2² = 400516313 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400516313) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22250898 + ... + 22250915.

It is an arithmetic number, because the mean of its divisors is an integer number (96420597).

Almost surely, 2^400516317 is an apocalyptic number.

It is an amenable number.

400516317 is a deficient number, since it is larger than the sum of its proper divisors (178007265).

400516317 is a wasteful number, since it uses less digits than its factorization.

400516317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44501819 (or 44501816 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 400516317 is about 20012.9037623229. The cubic root of 400516317 is about 737.1231847714.

The spelling of 400516317 in words is "four hundred million, five hundred sixteen thousand, three hundred seventeen".