400238808 has 16 divisors (see below), whose sum is σ = 1000597080. Its totient is φ = 133412928.

The previous prime is 400238807. The next prime is 400238869. The reversal of 400238808 is 808832004.

It is a super-2 number, since 2×400238808² = 320382206858521728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400238807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8338285 + ... + 8338332.

Almost surely, 2^400238808 is an apocalyptic number.

It is an amenable number.

400238808 is an abundant number, since it is smaller than the sum of its proper divisors (600358272).

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

400238808 is a wasteful number, since it uses less digits than its factorization.

400238808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16676626 (or 16676622 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 400238808 is about 20005.9693091837. The cubic root of 400238808 is about 736.9528999232.

The spelling of 400238808 in words is "four hundred million, two hundred thirty-eight thousand, eight hundred eight".