28846643 has 16 divisors (see below), whose sum is σ = 34564800. Its totient is φ = 24046848.

The previous prime is 28846639. The next prime is 28846651. The reversal of 28846643 is 34664882.

It is not a de Polignac number, because 28846643 - 2² = 28846639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28846643.

It is not an unprimeable number, because it can be changed into a prime (28846663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11555 + ... + 13827.

It is an arithmetic number, because the mean of its divisors is an integer number (2160300).

Almost surely, 2^28846643 is an apocalyptic number.

28846643 is a deficient number, since it is larger than the sum of its proper divisors (5718157).

28846643 is an equidigital number, since it uses as much as digits as its factorization.

28846643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2331 (or 2317 counting only the distinct ones).

The product of its digits is 221184, while the sum is 41.

The square root of 28846643 is about 5370.9070928475. The cubic root of 28846643 is about 306.6891604221.

The spelling of 28846643 in words is "twenty-eight million, eight hundred forty-six thousand, six hundred forty-three".