406639401 has 16 divisors (see below), whose sum is σ = 622377984. Its totient is φ = 231339024.

The previous prime is 406639391. The next prime is 406639447. The reversal of 406639401 is 104936604.

It is not a de Polignac number, because 406639401 - 2⁹ = 406638889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (406639451) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37885 + ... + 47418.

It is an arithmetic number, because the mean of its divisors is an integer number (38898624).

Almost surely, 2^406639401 is an apocalyptic number.

It is an amenable number.

406639401 is a deficient number, since it is larger than the sum of its proper divisors (215738583).

406639401 is a wasteful number, since it uses less digits than its factorization.

406639401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85540.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 406639401 is about 20165.3019069886. The cubic root of 406639401 is about 740.8605772132.

The spelling of 406639401 in words is "four hundred six million, six hundred thirty-nine thousand, four hundred one".