16540404 has 24 divisors (see below), whose sum is σ = 40272960. Its totient is φ = 5273664.

The previous prime is 16540397. The next prime is 16540417. The reversal of 16540404 is 40404561.

16540404 = 837² + 838² + ... + 859².

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29689 + ... + 30240.

It is an arithmetic number, because the mean of its divisors is an integer number (1678040).

Almost surely, 2^16540404 is an apocalyptic number.

It is an amenable number.

16540404 is an abundant number, since it is smaller than the sum of its proper divisors (23732556).

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

16540404 is a wasteful number, since it uses less digits than its factorization.

16540404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59959 (or 59957 counting only the distinct ones).

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

The square root of 16540404 is about 4066.9895500235. The cubic root of 16540404 is about 254.7897998639.

Adding to 16540404 its reverse (40404561), we get a palindrome (56944965).

The spelling of 16540404 in words is "sixteen million, five hundred forty thousand, four hundred four".