404514640 has 20 divisors (see below), whose sum is σ = 940496724. Its totient is φ = 161805824.

The previous prime is 404514637. The next prime is 404514647. The reversal of 404514640 is 46415404.

It can be written as a sum of positive squares in 2 ways, for example, as 83101456 + 321413184 = 9116^2 + 17928^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 404514599 and 404514608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404514647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2528137 + ... + 2528296.

Almost surely, 2^404514640 is an apocalyptic number.

404514640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

404514640 is an abundant number, since it is smaller than the sum of its proper divisors (535982084).

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

404514640 is a wasteful number, since it uses less digits than its factorization.

404514640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5056446 (or 5056440 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 404514640 is about 20112.5493162851. The cubic root of 404514640 is about 739.5679484273.

The spelling of 404514640 in words is "four hundred four million, five hundred fourteen thousand, six hundred forty".