400007007 has 12 divisors (see below), whose sum is σ = 602909424. Its totient is φ = 255076800.

The previous prime is 400006987. The next prime is 400007009. The reversal of 400007007 is 700700004.

It is not a de Polignac number, because 400007007 - 2⁸ = 400006751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400007009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 965994 + ... + 966407.

It is an arithmetic number, because the mean of its divisors is an integer number (50242452).

Almost surely, 2^400007007 is an apocalyptic number.

400007007 is a deficient number, since it is larger than the sum of its proper divisors (202902417).

400007007 is a wasteful number, since it uses less digits than its factorization.

400007007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1932430 (or 1932427 counting only the distinct ones).

The product of its (nonzero) digits is 196, while the sum is 18.

The square root of 400007007 is about 20000.1751742328. The cubic root of 400007007 is about 736.8106020377.

The spelling of 400007007 in words is "four hundred million, seven thousand, seven".