404165400 has 48 divisors (see below), whose sum is σ = 1252914600. Its totient is φ = 107777280.

The previous prime is 404165389. The next prime is 404165401. The reversal of 404165400 is 4561404.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404165401) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 336205 + ... + 337404.

Almost surely, 2^404165400 is an apocalyptic number.

404165400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

404165400 is an abundant number, since it is smaller than the sum of its proper divisors (848749200).

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

404165400 is a wasteful number, since it uses less digits than its factorization.

404165400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673628 (or 673619 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 404165400 is about 20103.8652999865. The cubic root of 404165400 is about 739.3550504244.

The spelling of 404165400 in words is "four hundred four million, one hundred sixty-five thousand, four hundred".