28845620 has 24 divisors (see below), whose sum is σ = 60679584. Its totient is φ = 11518496.

The previous prime is 28845613. The next prime is 28845643. The reversal of 28845620 is 2654882.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18179 + ... + 19701.

It is an arithmetic number, because the mean of its divisors is an integer number (2528316).

Almost surely, 2^28845620 is an apocalyptic number.

28845620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28845620 is an abundant number, since it is smaller than the sum of its proper divisors (31833964).

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

28845620 is a wasteful number, since it uses less digits than its factorization.

28845620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2479 (or 2477 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 35.

The square root of 28845620 is about 5370.8118566935. The cubic root of 28845620 is about 306.6855349659.

The spelling of 28845620 in words is "twenty-eight million, eight hundred forty-five thousand, six hundred twenty".