404213772 has 12 divisors (see below), whose sum is σ = 943165496. Its totient is φ = 134737920.

The previous prime is 404213767. The next prime is 404213791. The reversal of 404213772 is 277312404.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16842229 + ... + 16842252.

Almost surely, 2^404213772 is an apocalyptic number.

It is an amenable number.

404213772 is an abundant number, since it is smaller than the sum of its proper divisors (538951724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

404213772 is a wasteful number, since it uses less digits than its factorization.

404213772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33684488 (or 33684486 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 30.

The square root of 404213772 is about 20105.0683162232. The cubic root of 404213772 is about 739.3845454907.

The spelling of 404213772 in words is "four hundred four million, two hundred thirteen thousand, seven hundred seventy-two".