400709001 has 64 divisors (see below), whose sum is σ = 690610176. Its totient is φ = 200620800.

The previous prime is 400708999. The next prime is 400709011. The reversal of 400709001 is 100907004.

It is not a de Polignac number, because 400709001 - 2¹ = 400708999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (400709011) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1478496 + ... + 1478766.

It is an arithmetic number, because the mean of its divisors is an integer number (10790784).

Almost surely, 2^400709001 is an apocalyptic number.

It is an amenable number.

400709001 is a deficient number, since it is larger than the sum of its proper divisors (289901175).

400709001 is a wasteful number, since it uses less digits than its factorization.

400709001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 400709001 is about 20017.7171775405. The cubic root of 400709001 is about 737.2413731091.

The spelling of 400709001 in words is "four hundred million, seven hundred nine thousand, one".