28038380 has 24 divisors (see below), whose sum is σ = 61441632. Its totient is φ = 10727552.

The previous prime is 28038377. The next prime is 28038391. The reversal of 28038380 is 8383082.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30017 + ... + 30936.

It is an arithmetic number, because the mean of its divisors is an integer number (2560068).

Almost surely, 2^28038380 is an apocalyptic number.

28038380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28038380 is an abundant number, since it is smaller than the sum of its proper divisors (33403252).

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

28038380 is a wasteful number, since it uses less digits than its factorization.

28038380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60985 (or 60983 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 28038380 is about 5295.1279493512. The cubic root of 28038380 is about 303.7975770395.

The spelling of 28038380 in words is "twenty-eight million, thirty-eight thousand, three hundred eighty".