16109990 has 16 divisors (see below), whose sum is σ = 31228848. Its totient is φ = 5948256.

The previous prime is 16109953. The next prime is 16110001. The reversal of 16109990 is 9990161.

It is a self number, because there is not a number n which added to its sum of digits gives 16109990.

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, 61832 + ... + 62091.

It is an arithmetic number, because the mean of its divisors is an integer number (1951803).

Almost surely, 2^16109990 is an apocalyptic number.

16109990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16109990 is a deficient number, since it is larger than the sum of its proper divisors (15118858).

16109990 is a wasteful number, since it uses less digits than its factorization.

16109990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123943.

The product of its (nonzero) digits is 4374, while the sum is 35.

The square root of 16109990 is about 4013.7252023525. The cubic root of 16109990 is about 252.5603032129.

The spelling of 16109990 in words is "sixteen million, one hundred nine thousand, nine hundred ninety".