28822680 has 144 divisors (see below), whose sum is σ = 99431280. Its totient is φ = 7227264.

The previous prime is 28822669. The next prime is 28822687. The reversal of 28822680 is 8622882.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28822687) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 488491 + ... + 488549.

It is an arithmetic number, because the mean of its divisors is an integer number (690495).

Almost surely, 2^28822680 is an apocalyptic number.

28822680 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 28822680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49715640).

28822680 is an abundant number, since it is smaller than the sum of its proper divisors (70608600).

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

28822680 is a wasteful number, since it uses less digits than its factorization.

28822680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158 (or 92 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 28822680 is about 5368.6758143885. The cubic root of 28822680 is about 306.6042143357.

The spelling of 28822680 in words is "twenty-eight million, eight hundred twenty-two thousand, six hundred eighty".