28940646 has 16 divisors (see below), whose sum is σ = 66150144. Its totient is φ = 8268744.

The previous prime is 28940627. The next prime is 28940663. The reversal of 28940646 is 64604982.

It is a Curzon number.

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, 344490 + ... + 344573.

It is an arithmetic number, because the mean of its divisors is an integer number (4134384).

Almost surely, 2^28940646 is an apocalyptic number.

28940646 is an abundant number, since it is smaller than the sum of its proper divisors (37209498).

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

28940646 is a wasteful number, since it uses less digits than its factorization.

28940646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689075.

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 28940646 is about 5379.6511039286. The cubic root of 28940646 is about 307.0219367731.

The spelling of 28940646 in words is "twenty-eight million, nine hundred forty thousand, six hundred forty-six".