28938025 has 24 divisors (see below), whose sum is σ = 38122560. Its totient is φ = 21743040.

The previous prime is 28938001. The next prime is 28938047. The reversal of 28938025 is 52083982.

It is not a de Polignac number, because 28938025 - 2¹³ = 28929833 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33499 + ... + 34351.

It is an arithmetic number, because the mean of its divisors is an integer number (1588440).

Almost surely, 2^28938025 is an apocalyptic number.

28938025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28938025 is a deficient number, since it is larger than the sum of its proper divisors (9184535).

28938025 is a wasteful number, since it uses less digits than its factorization.

28938025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 945 (or 940 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 28938025 is about 5379.4074952545. The cubic root of 28938025 is about 307.0126680467.

It can be divided in two parts, 289 and 38025, that multiplied together give a square (10989225 = 3315²).

The spelling of 28938025 in words is "twenty-eight million, nine hundred thirty-eight thousand, twenty-five".