400105312 has 24 divisors (see below), whose sum is σ = 788243400. Its totient is φ = 199916544.

The previous prime is 400105301. The next prime is 400105331. The reversal of 400105312 is 213501004.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57139 + ... + 63757.

It is an arithmetic number, because the mean of its divisors is an integer number (32843475).

Almost surely, 2^400105312 is an apocalyptic number.

It is an amenable number.

400105312 is a deficient number, since it is larger than the sum of its proper divisors (388138088).

400105312 is a wasteful number, since it uses less digits than its factorization.

400105312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8518 (or 8510 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 400105312 is about 20002.6326267319. The cubic root of 400105312 is about 736.8709561750.

Adding to 400105312 its reverse (213501004), we get a palindrome (613606316).

The spelling of 400105312 in words is "four hundred million, one hundred five thousand, three hundred twelve".