400502007 has 24 divisors (see below), whose sum is σ = 614889600. Its totient is φ = 250481808.

The previous prime is 400501961. The next prime is 400502021. The reversal of 400502007 is 700205004.

It is a happy number.

It is not a de Polignac number, because 400502007 - 2⁶ = 400501943 is a prime.

It is a super-2 number, since 2×400502007² = 320803715222056098, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400507007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6244 + ... + 28982.

It is an arithmetic number, because the mean of its divisors is an integer number (25620400).

Almost surely, 2^400502007 is an apocalyptic number.

400502007 is a deficient number, since it is larger than the sum of its proper divisors (214387593).

400502007 is a wasteful number, since it uses less digits than its factorization.

400502007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22867 (or 22864 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 18.

The square root of 400502007 is about 20012.5462397967. The cubic root of 400502007 is about 737.1144058046.

The spelling of 400502007 in words is "four hundred million, five hundred two thousand, seven".