16408990 has 16 divisors (see below), whose sum is σ = 31808448. Its totient is φ = 6058656.

The previous prime is 16408981. The next prime is 16408993. The reversal of 16408990 is 9980461.

It is a zygodrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16408993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62982 + ... + 63241.

It is an arithmetic number, because the mean of its divisors is an integer number (1988028).

Almost surely, 2^16408990 is an apocalyptic number.

16408990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16408990 is a deficient number, since it is larger than the sum of its proper divisors (15399458).

16408990 is a wasteful number, since it uses less digits than its factorization.

16408990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126243.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 16408990 is about 4050.8011553272. The cubic root of 16408990 is about 254.1132340723.

The spelling of 16408990 in words is "sixteen million, four hundred eight thousand, nine hundred ninety".