400454312 has 16 divisors (see below), whose sum is σ = 795019860. Its totient is φ = 188449024.

The previous prime is 400454303. The next prime is 400454321. The reversal of 400454312 is 213454004.

It is an interprime number because it is at equal distance from previous prime (400454303) and next prime (400454321).

It can be written as a sum of positive squares in 2 ways, for example, as 398162116 + 2292196 = 19954^2 + 1514^2 .

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, 1472123 + ... + 1472394.

Almost surely, 2^400454312 is an apocalyptic number.

It is an amenable number.

400454312 is a deficient number, since it is larger than the sum of its proper divisors (394565548).

400454312 is a wasteful number, since it uses less digits than its factorization.

400454312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2944540 (or 2944536 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 400454312 is about 20011.3545768396. The cubic root of 400454312 is about 737.0851441391.

The spelling of 400454312 in words is "four hundred million, four hundred fifty-four thousand, three hundred twelve".