28648830 has 48 divisors (see below), whose sum is σ = 79986960. Its totient is φ = 6547968.

The previous prime is 28648811. The next prime is 28648831. The reversal of 28648830 is 3884682.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28648831) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8275 + ... + 11214.

It is an arithmetic number, because the mean of its divisors is an integer number (1666395).

Almost surely, 2^28648830 is an apocalyptic number.

28648830 is an abundant number, since it is smaller than the sum of its proper divisors (51338130).

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

28648830 is a wasteful number, since it uses less digits than its factorization.

28648830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19513 (or 19506 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 39.

The square root of 28648830 is about 5352.4601820098. The cubic root of 28648830 is about 305.9865216841.

The spelling of 28648830 in words is "twenty-eight million, six hundred forty-eight thousand, eight hundred thirty".