16981590 has 32 divisors (see below), whose sum is σ = 42529536. Its totient is φ = 4331360.

The previous prime is 16981577. The next prime is 16981609. The reversal of 16981590 is 9518961.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11616 + ... + 12995.

It is an arithmetic number, because the mean of its divisors is an integer number (1329048).

Almost surely, 2^16981590 is an apocalyptic number.

16981590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16981590 is an abundant number, since it is smaller than the sum of its proper divisors (25547946).

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

16981590 is a wasteful number, since it uses less digits than its factorization.

16981590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24644.

The product of its (nonzero) digits is 19440, while the sum is 39.

The square root of 16981590 is about 4120.8724804342. The cubic root of 16981590 is about 257.0353073164.

It can be divided in two parts, 16981 and 590, that added together give a palindrome (17571).

The spelling of 16981590 in words is "sixteen million, nine hundred eighty-one thousand, five hundred ninety".