400023208 has 32 divisors (see below), whose sum is σ = 808889760. Its totient is φ = 184363200.

The previous prime is 400023181. The next prime is 400023223. The reversal of 400023208 is 802320004.

It is a happy number.

It is a super-2 number, since 2×400023208² = 320037133877222528, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83683 + ... + 88333.

It is an arithmetic number, because the mean of its divisors is an integer number (25277805).

Almost surely, 2^400023208 is an apocalyptic number.

It is an amenable number.

400023208 is an abundant number, since it is smaller than the sum of its proper divisors (408866552).

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

400023208 is a wasteful number, since it uses less digits than its factorization.

400023208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5497 (or 5493 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 400023208 is about 20000.5801915844. The cubic root of 400023208 is about 736.8205492863.

The spelling of 400023208 in words is "four hundred million, twenty-three thousand, two hundred eight".