400142504 has 16 divisors (see below), whose sum is σ = 750796020. Its totient is φ = 199930240.

The previous prime is 400142467. The next prime is 400142573. The reversal of 400142504 is 405241004.

It can be written as a sum of positive squares in 2 ways, for example, as 400080004 + 62500 = 20002^2 + 250^2 .

It is a super-2 number, since 2×400142504² = 320228047014780032, which contains 22 as substring.

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, 5039 + ... + 28734.

Almost surely, 2^400142504 is an apocalyptic number.

It is an amenable number.

400142504 is a deficient number, since it is larger than the sum of its proper divisors (350653516).

400142504 is a wasteful number, since it uses less digits than its factorization.

400142504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35260 (or 35256 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 400142504 is about 20003.5622827535. The cubic root of 400142504 is about 736.8937875435.

Adding to 400142504 its reverse (405241004), we get a palindrome (805383508).

The spelling of 400142504 in words is "four hundred million, one hundred forty-two thousand, five hundred four".