28338620 has 12 divisors (see below), whose sum is σ = 59511144. Its totient is φ = 11335440.

The previous prime is 28338613. The next prime is 28338637. The reversal of 28338620 is 2683382.

It is a happy number.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 708446 + ... + 708485.

It is an arithmetic number, because the mean of its divisors is an integer number (4959262).

Almost surely, 2^28338620 is an apocalyptic number.

28338620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28338620 is an abundant number, since it is smaller than the sum of its proper divisors (31172524).

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

28338620 is a wasteful number, since it uses less digits than its factorization.

28338620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1416940 (or 1416938 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 28338620 is about 5323.4030469240. The cubic root of 28338620 is about 304.8781023230.

The spelling of 28338620 in words is "twenty-eight million, three hundred thirty-eight thousand, six hundred twenty".