28769628 has 24 divisors (see below), whose sum is σ = 67231360. Its totient is φ = 9575280.

The previous prime is 28769621. The next prime is 28769633. The reversal of 28769628 is 82696782.

It is a happy number.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28769621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8913 + ... + 11703.

Almost surely, 2^28769628 is an apocalyptic number.

It is an amenable number.

28769628 is an abundant number, since it is smaller than the sum of its proper divisors (38461732).

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

28769628 is a wasteful number, since it uses less digits than its factorization.

28769628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3657 (or 3655 counting only the distinct ones).

The product of its digits is 580608, while the sum is 48.

The square root of 28769628 is about 5363.7326555301. The cubic root of 28769628 is about 306.4159834368.

The spelling of 28769628 in words is "twenty-eight million, seven hundred sixty-nine thousand, six hundred twenty-eight".