16408290 has 16 divisors (see below), whose sum is σ = 39379968. Its totient is φ = 4375536.

The previous prime is 16408261. The next prime is 16408303. The reversal of 16408290 is 9280461.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 546943 = 16408290 / (1 + 6 + 4 + 0 + 8 + 2 + 9 + 0).

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, 273442 + ... + 273501.

It is an arithmetic number, because the mean of its divisors is an integer number (2461248).

Almost surely, 2^16408290 is an apocalyptic number.

16408290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16408290 is an abundant number, since it is smaller than the sum of its proper divisors (22971678).

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

16408290 is a wasteful number, since it uses less digits than its factorization.

16408290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546953.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 16408290 is about 4050.7147517444. The cubic root of 16408290 is about 254.1096205695.

The spelling of 16408290 in words is "sixteen million, four hundred eight thousand, two hundred ninety".