28620375 has 32 divisors (see below), whose sum is σ = 54432768. Its totient is φ = 13082400.

The previous prime is 28620373. The next prime is 28620377. The reversal of 28620375 is 57302682.

It is an interprime number because it is at equal distance from previous prime (28620373) and next prime (28620377).

It is not a de Polignac number, because 28620375 - 2¹ = 28620373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28620373) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2827 + ... + 8076.

It is an arithmetic number, because the mean of its divisors is an integer number (1701024).

Almost surely, 2^28620375 is an apocalyptic number.

28620375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28620375 is a deficient number, since it is larger than the sum of its proper divisors (25812393).

28620375 is a wasteful number, since it uses less digits than its factorization.

28620375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10928 (or 10918 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 28620375 is about 5349.8013981829. The cubic root of 28620375 is about 305.8851826915.

The spelling of 28620375 in words is "twenty-eight million, six hundred twenty thousand, three hundred seventy-five".