404040120 has 64 divisors (see below), whose sum is σ = 1322317440. Its totient is φ = 97948800.

The previous prime is 404040101. The next prime is 404040127. The reversal of 404040120 is 21040404.

It is a super-2 number, since 2×404040120² = 326496837139228800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 404040120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404040127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151726 + ... + 154365.

It is an arithmetic number, because the mean of its divisors is an integer number (20661210).

Almost surely, 2^404040120 is an apocalyptic number.

404040120 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

404040120 is an abundant number, since it is smaller than the sum of its proper divisors (918277320).

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

404040120 is a wasteful number, since it uses less digits than its factorization.

404040120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306116 (or 306112 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 404040120 is about 20100.7492397672. The cubic root of 404040120 is about 739.2786493825.

Adding to 404040120 its reverse (21040404), we get a palindrome (425080524).

The spelling of 404040120 in words is "four hundred four million, forty thousand, one hundred twenty".