28002975 has 96 divisors (see below), whose sum is σ = 62329344. Its totient is φ = 10713600.

The previous prime is 28002971. The next prime is 28003007. The reversal of 28002975 is 57920082.

It is not a de Polignac number, because 28002975 - 2² = 28002971 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28002971) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 74889 + ... + 75261.

It is an arithmetic number, because the mean of its divisors is an integer number (649264).

Almost surely, 2^28002975 is an apocalyptic number.

28002975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28002975 is an abundant number, since it is smaller than the sum of its proper divisors (34326369).

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

28002975 is a wasteful number, since it uses less digits than its factorization.

28002975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417 (or 412 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 28002975 is about 5291.7837257394. The cubic root of 28002975 is about 303.6696513926.

It can be divided in two parts, 2800 and 2975, that added together give a palindrome (5775).

The spelling of 28002975 in words is "twenty-eight million, two thousand, nine hundred seventy-five".