28838020 has 24 divisors (see below), whose sum is σ = 61588800. Its totient is φ = 11339232.

The previous prime is 28838011. The next prime is 28838023. The reversal of 28838020 is 2083882.

It is not an unprimeable number, because it can be changed into a prime (28838023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11040 + ... + 13399.

It is an arithmetic number, because the mean of its divisors is an integer number (2566200).

Almost surely, 2^28838020 is an apocalyptic number.

28838020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28838020 is an abundant number, since it is smaller than the sum of its proper divisors (32750780).

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

28838020 is a wasteful number, since it uses less digits than its factorization.

28838020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24507 (or 24505 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 28838020 is about 5370.1042820415. The cubic root of 28838020 is about 306.6585982964.

The spelling of 28838020 in words is "twenty-eight million, eight hundred thirty-eight thousand, twenty".