28906628 has 12 divisors (see below), whose sum is σ = 50673420. Its totient is φ = 14428512.

The previous prime is 28906627. The next prime is 28906651. The reversal of 28906628 is 82660982.

It can be written as a sum of positive squares in 2 ways, for example, as 369664 + 28536964 = 608^2 + 5342^2 .

It is not an unprimeable number, because it can be changed into a prime (28906627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3443 + ... + 8346.

It is an arithmetic number, because the mean of its divisors is an integer number (4222785).

Almost surely, 2^28906628 is an apocalyptic number.

It is an amenable number.

28906628 is a deficient number, since it is larger than the sum of its proper divisors (21766792).

28906628 is a wasteful number, since it uses less digits than its factorization.

28906628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12406 (or 12404 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 28906628 is about 5376.4884450727. The cubic root of 28906628 is about 306.9015942955.

The spelling of 28906628 in words is "twenty-eight million, nine hundred six thousand, six hundred twenty-eight".