16400290 has 16 divisors (see below), whose sum is σ = 29937600. Its totient is φ = 6467440.

The previous prime is 16400273. The next prime is 16400299. The reversal of 16400290 is 9200461.

It is a plaindrome in base 12.

It is a zygodrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (16400299) 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, 10840 + ... + 12259.

It is an arithmetic number, because the mean of its divisors is an integer number (1871100).

Almost surely, 2^16400290 is an apocalyptic number.

16400290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16400290 is a deficient number, since it is larger than the sum of its proper divisors (13537310).

16400290 is a wasteful number, since it uses less digits than its factorization.

16400290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23177.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 16400290 is about 4049.7271513029. The cubic root of 16400290 is about 254.0683160940.

The spelling of 16400290 in words is "sixteen million, four hundred thousand, two hundred ninety".