404089040 has 20 divisors (see below), whose sum is σ = 939507204. Its totient is φ = 161635584.

The previous prime is 404089009. The next prime is 404089073. The reversal of 404089040 is 40980404.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 199713424 + 204375616 = 14132^2 + 14296^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 404088994 and 404089012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2525477 + ... + 2525636.

Almost surely, 2^404089040 is an apocalyptic number.

404089040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

404089040 is an abundant number, since it is smaller than the sum of its proper divisors (535418164).

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

404089040 is a wasteful number, since it uses less digits than its factorization.

404089040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5051126 (or 5051120 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 404089040 is about 20101.9660729989. The cubic root of 404089040 is about 739.3084847464.

The spelling of 404089040 in words is "four hundred four million, eighty-nine thousand, forty".