400552136 has 16 divisors (see below), whose sum is σ = 751682700. Its totient is φ = 200103424.

The previous prime is 400552127. The next prime is 400552151. The reversal of 400552136 is 631255004.

It can be written as a sum of positive squares in 2 ways, for example, as 399760036 + 792100 = 19994^2 + 890^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11441 + ... + 30528.

Almost surely, 2^400552136 is an apocalyptic number.

It is an amenable number.

400552136 is a deficient number, since it is larger than the sum of its proper divisors (351130564).

400552136 is a wasteful number, since it uses less digits than its factorization.

400552136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43168 (or 43164 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 400552136 is about 20013.7986399384. The cubic root of 400552136 is about 737.1451582651.

The spelling of 400552136 in words is "four hundred million, five hundred fifty-two thousand, one hundred thirty-six".