16640742 has 16 divisors (see below), whose sum is σ = 34056000. Its totient is φ = 5417832.

The previous prime is 16640731. The next prime is 16640759. The reversal of 16640742 is 24704661.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 31992 + ... + 32507.

It is an arithmetic number, because the mean of its divisors is an integer number (2128500).

Almost surely, 2^16640742 is an apocalyptic number.

16640742 is an abundant number, since it is smaller than the sum of its proper divisors (17415258).

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

16640742 is a wasteful number, since it uses less digits than its factorization.

16640742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64547.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 16640742 is about 4079.3065587180. The cubic root of 16640742 is about 255.3039666241.

The spelling of 16640742 in words is "sixteen million, six hundred forty thousand, seven hundred forty-two".