16640046 has 16 divisors (see below), whose sum is σ = 36978000. Its totient is φ = 5546664.

The previous prime is 16640033. The next prime is 16640051. The reversal of 16640046 is 64004661.

16640046 is a `hidden beast` number, since 16 + 640 + 0 + 4 + 6 = 666.

It is a super-2 number, since 2×16640046² = 553782261764232, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154021 + ... + 154128.

It is an arithmetic number, because the mean of its divisors is an integer number (2311125).

Almost surely, 2^16640046 is an apocalyptic number.

16640046 is an abundant number, since it is smaller than the sum of its proper divisors (20337954).

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

16640046 is a wasteful number, since it uses less digits than its factorization.

16640046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308160 (or 308154 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 16640046 is about 4079.2212492092. The cubic root of 16640046 is about 255.3004072067.

The spelling of 16640046 in words is "sixteen million, six hundred forty thousand, forty-six".