28620575 has 6 divisors (see below), whose sum is σ = 35489544. Its totient is φ = 22896440.

The previous prime is 28620569. The next prime is 28620587. The reversal of 28620575 is 57502682.

It is not a de Polignac number, because 28620575 - 2⁶ = 28620511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 572387 + ... + 572436.

It is an arithmetic number, because the mean of its divisors is an integer number (5914924).

Almost surely, 2^28620575 is an apocalyptic number.

28620575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28620575 is a deficient number, since it is larger than the sum of its proper divisors (6868969).

28620575 is a wasteful number, since it uses less digits than its factorization.

28620575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144833 (or 1144828 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 28620575 is about 5349.8200904329. The cubic root of 28620575 is about 305.8858952013.

The spelling of 28620575 in words is "twenty-eight million, six hundred twenty thousand, five hundred seventy-five".