16290491 has 12 divisors (see below), whose sum is σ = 19028880. Its totient is φ = 13905360.

The previous prime is 16290473. The next prime is 16290497. The reversal of 16290491 is 19409261.

It is not a de Polignac number, because 16290491 - 2⁶ = 16290427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16290497) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14705 + ... + 15773.

It is an arithmetic number, because the mean of its divisors is an integer number (1585740).

Almost surely, 2^16290491 is an apocalyptic number.

16290491 is a deficient number, since it is larger than the sum of its proper divisors (2738389).

16290491 is a wasteful number, since it uses less digits than its factorization.

16290491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1394 (or 1387 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 16290491 is about 4036.1480399014. The cubic root of 16290491 is about 253.5000551127.

The spelling of 16290491 in words is "sixteen million, two hundred ninety thousand, four hundred ninety-one".