16640492 has 12 divisors (see below), whose sum is σ = 31768296. Its totient is φ = 7563840.

The previous prime is 16640473. The next prime is 16640509. The reversal of 16640492 is 29404661.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189053 + ... + 189140.

It is an arithmetic number, because the mean of its divisors is an integer number (2647358).

Almost surely, 2^16640492 is an apocalyptic number.

It is an amenable number.

16640492 is a deficient number, since it is larger than the sum of its proper divisors (15127804).

16640492 is a wasteful number, since it uses less digits than its factorization.

16640492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378208 (or 378206 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 16640492 is about 4079.2759161400. The cubic root of 16640492 is about 255.3026881092.

The spelling of 16640492 in words is "sixteen million, six hundred forty thousand, four hundred ninety-two".