400212368 has 30 divisors (see below), whose sum is σ = 821701314. Its totient is φ = 188179968.

The previous prime is 400212367. The next prime is 400212389. The reversal of 400212368 is 863212004.

It can be written as a sum of positive squares in 3 ways, for example, as 692224 + 399520144 = 832^2 + 19988^2 .

It is not an unprimeable number, because it can be changed into a prime (400212367) 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, 329330 + ... + 330542.

Almost surely, 2^400212368 is an apocalyptic number.

It is an amenable number.

400212368 is an abundant number, since it is smaller than the sum of its proper divisors (421488946).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400212368 is an equidigital number, since it uses as much as digits as its factorization.

400212368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2451 (or 1232 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 400212368 is about 20005.3084954969. The cubic root of 400212368 is about 736.9366717253.

The spelling of 400212368 in words is "four hundred million, two hundred twelve thousand, three hundred sixty-eight".