400023108 has 18 divisors (see below), whose sum is σ = 1011169614. Its totient is φ = 133341024.

The previous prime is 400023097. The next prime is 400023139. The reversal of 400023108 is 801320004.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 385415424 + 14607684 = 19632^2 + 3822^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5555841 + ... + 5555912.

Almost surely, 2^400023108 is an apocalyptic number.

It is an amenable number.

400023108 is an abundant number, since it is smaller than the sum of its proper divisors (611146506).

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

400023108 is a wasteful number, since it uses less digits than its factorization.

400023108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11111763 (or 11111758 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 400023108 is about 20000.5776916568. The cubic root of 400023108 is about 736.8204878882.

The spelling of 400023108 in words is "four hundred million, twenty-three thousand, one hundred eight".