404031340 has 48 divisors (see below), whose sum is σ = 887427072. Its totient is φ = 154224576.

The previous prime is 404031319. The next prime is 404031361. The reversal of 404031340 is 43130404.

It is an interprime number because it is at equal distance from previous prime (404031319) and next prime (404031361).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 278497 + ... + 279943.

It is an arithmetic number, because the mean of its divisors is an integer number (18488064).

Almost surely, 2^404031340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 404031340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (443713536).

404031340 is an abundant number, since it is smaller than the sum of its proper divisors (483395732).

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

404031340 is a wasteful number, since it uses less digits than its factorization.

404031340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2086 (or 2084 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 404031340 is about 20100.5308387614. The cubic root of 404031340 is about 739.2732943751.

Adding to 404031340 its reverse (43130404), we get a palindrome (447161744).

It can be divided in two parts, 40 and 4031340, that added together give a triangular number (4031380 = T₂₈₃₉).

The spelling of 404031340 in words is "four hundred four million, thirty-one thousand, three hundred forty".