404401166 has 16 divisors (see below), whose sum is σ = 662215344. Its totient is φ = 184089024.

The previous prime is 404401159. The next prime is 404401177. The reversal of 404401166 is 661104404.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104636 + ... + 108431.

It is an arithmetic number, because the mean of its divisors is an integer number (41388459).

Almost surely, 2^404401166 is an apocalyptic number.

404401166 is a deficient number, since it is larger than the sum of its proper divisors (257814178).

404401166 is a wasteful number, since it uses less digits than its factorization.

404401166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213155.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 404401166 is about 20109.7281433638. The cubic root of 404401166 is about 739.4987876986.

The spelling of 404401166 in words is "four hundred four million, four hundred one thousand, one hundred sixty-six".