16191490 has 32 divisors (see below), whose sum is σ = 33459840. Its totient is φ = 5526144.

The previous prime is 16191457. The next prime is 16191491. The reversal of 16191490 is 9419161.

It is not an unprimeable number, because it can be changed into a prime (16191491) 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, 21541 + ... + 22279.

It is an arithmetic number, because the mean of its divisors is an integer number (1045620).

Almost surely, 2^16191490 is an apocalyptic number.

16191490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16191490 is an abundant number, since it is smaller than the sum of its proper divisors (17268350).

16191490 is a wasteful number, since it uses less digits than its factorization.

16191490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 16191490 is about 4023.8650573795. The cubic root of 16191490 is about 252.9854855833.

The spelling of 16191490 in words is "sixteen million, one hundred ninety-one thousand, four hundred ninety".