28878652 has 12 divisors (see below), whose sum is σ = 55132056. Its totient is φ = 13126640.

The previous prime is 28878643. The next prime is 28878653. The reversal of 28878652 is 25687882.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28878653) 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, 328123 + ... + 328210.

It is an arithmetic number, because the mean of its divisors is an integer number (4594338).

Almost surely, 2^28878652 is an apocalyptic number.

28878652 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28878652 is a deficient number, since it is larger than the sum of its proper divisors (26253404).

28878652 is a wasteful number, since it uses less digits than its factorization.

28878652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656348 (or 656346 counting only the distinct ones).

The product of its digits is 430080, while the sum is 46.

The square root of 28878652 is about 5373.8861171409. The cubic root of 28878652 is about 306.8025552987.

The spelling of 28878652 in words is "twenty-eight million, eight hundred seventy-eight thousand, six hundred fifty-two".