16187990 has 32 divisors (see below), whose sum is σ = 35864640. Its totient is φ = 5122944.

The previous prime is 16187987. The next prime is 16187993. The reversal of 16187990 is 9978161.

It is a happy number.

16187990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (16187987) and next prime (16187993).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16187993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7985 + ... + 9804.

It is an arithmetic number, because the mean of its divisors is an integer number (1120770).

Almost surely, 2^16187990 is an apocalyptic number.

16187990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16187990 is an abundant number, since it is smaller than the sum of its proper divisors (19676650).

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

16187990 is a wasteful number, since it uses less digits than its factorization.

16187990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17816.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 16187990 is about 4023.4301286340. The cubic root of 16187990 is about 252.9672555747.

The spelling of 16187990 in words is "sixteen million, one hundred eighty-seven thousand, nine hundred ninety".