16640734 has 16 divisors (see below), whose sum is σ = 27308160. Its totient is φ = 7542360.

The previous prime is 16640731. The next prime is 16640759. The reversal of 16640734 is 43704661.

It is a junction number, because it is equal to n+sod(n) for n = 16640696 and 16640705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16640731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8797 + ... + 10519.

It is an arithmetic number, because the mean of its divisors is an integer number (1706760).

Almost surely, 2^16640734 is an apocalyptic number.

16640734 is a deficient number, since it is larger than the sum of its proper divisors (10667426).

16640734 is a wasteful number, since it uses less digits than its factorization.

16640734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2175.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 16640734 is about 4079.3055781591. The cubic root of 16640734 is about 255.3039257118.

The spelling of 16640734 in words is "sixteen million, six hundred forty thousand, seven hundred thirty-four".