401872207 has 16 divisors (see below), whose sum is σ = 451396224. Its totient is φ = 354564000.

The previous prime is 401872181. The next prime is 401872223. The reversal of 401872207 is 702278104.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401872207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401872277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198832 + ... + 200842.

It is an arithmetic number, because the mean of its divisors is an integer number (28212264).

Almost surely, 2^401872207 is an apocalyptic number.

401872207 is a deficient number, since it is larger than the sum of its proper divisors (49524017).

401872207 is a wasteful number, since it uses less digits than its factorization.

401872207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2550.

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 401872207 is about 20046.7505346877. The cubic root of 401872207 is about 737.9540558154.

The spelling of 401872207 in words is "four hundred one million, eight hundred seventy-two thousand, two hundred seven".