27680646 has 16 divisors (see below), whose sum is σ = 63270144. Its totient is φ = 7908744.

The previous prime is 27680621. The next prime is 27680657. The reversal of 27680646 is 64608672.

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, 329490 + ... + 329573.

It is an arithmetic number, because the mean of its divisors is an integer number (3954384).

Almost surely, 2^27680646 is an apocalyptic number.

27680646 is an abundant number, since it is smaller than the sum of its proper divisors (35589498).

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

27680646 is a wasteful number, since it uses less digits than its factorization.

27680646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659075.

The product of its (nonzero) digits is 96768, while the sum is 39.

The square root of 27680646 is about 5261.2399679163. The cubic root of 27680646 is about 302.5000195797.

Subtracting from 27680646 its product of nonzero digits (96768), we obtain a triangular number (27583878 = T₇₄₂₇).

The spelling of 27680646 in words is "twenty-seven million, six hundred eighty thousand, six hundred forty-six".