400618361 has 16 divisors (see below), whose sum is σ = 479545920. Its totient is φ = 329833920.

The previous prime is 400618357. The next prime is 400618367. The reversal of 400618361 is 163816004.

It is not a de Polignac number, because 400618361 - 2² = 400618357 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400618367) 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, 18851 + ... + 34008.

It is an arithmetic number, because the mean of its divisors is an integer number (29971620).

Almost surely, 2^400618361 is an apocalyptic number.

It is an amenable number.

400618361 is a deficient number, since it is larger than the sum of its proper divisors (78927559).

400618361 is a wasteful number, since it uses less digits than its factorization.

400618361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52936.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 400618361 is about 20015.4530550772. The cubic root of 400618361 is about 737.1857811484.

The spelling of 400618361 in words is "four hundred million, six hundred eighteen thousand, three hundred sixty-one".