28900680 has 128 divisors (see below), whose sum is σ = 94970880. Its totient is φ = 7004160.

The previous prime is 28900679. The next prime is 28900681. The reversal of 28900680 is 8600982.

It is an interprime number because it is at equal distance from previous prime (28900679) and next prime (28900681).

It is not an unprimeable number, because it can be changed into a prime (28900681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63012 + ... + 63468.

It is an arithmetic number, because the mean of its divisors is an integer number (741960).

Almost surely, 2^28900680 is an apocalyptic number.

28900680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28900680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47485440).

28900680 is an abundant number, since it is smaller than the sum of its proper divisors (66070200).

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

28900680 is a wasteful number, since it uses less digits than its factorization.

28900680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519 (or 515 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 28900680 is about 5375.9352674674. The cubic root of 28900680 is about 306.8805428847.

The spelling of 28900680 in words is "twenty-eight million, nine hundred thousand, six hundred eighty".