404045887 has 32 divisors (see below), whose sum is σ = 501811200. Its totient is φ = 317634048.

The previous prime is 404045879. The next prime is 404045897. The reversal of 404045887 is 788540404.

It is a cyclic number.

It is not a de Polignac number, because 404045887 - 2³ = 404045879 is a prime.

It is a super-3 number, since 3×404045887³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404045827) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 681063 + ... + 681655.

It is an arithmetic number, because the mean of its divisors is an integer number (15681600).

Almost surely, 2^404045887 is an apocalyptic number.

404045887 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

404045887 is a deficient number, since it is larger than the sum of its proper divisors (97765313).

404045887 is a wasteful number, since it uses less digits than its factorization.

404045887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775.

The product of its (nonzero) digits is 143360, while the sum is 40.

The square root of 404045887 is about 20100.8926916194. The cubic root of 404045887 is about 739.2821666898.

The spelling of 404045887 in words is "four hundred four million, forty-five thousand, eight hundred eighty-seven".