28212375 has 32 divisors (see below), whose sum is σ = 49001472. Its totient is φ = 14388000.

The previous prime is 28212341. The next prime is 28212403. The reversal of 28212375 is 57321282.

It is not a de Polignac number, because 28212375 - 2⁶ = 28212311 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6990 + ... + 10260.

It is an arithmetic number, because the mean of its divisors is an integer number (1531296).

Almost surely, 2^28212375 is an apocalyptic number.

28212375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28212375 is a deficient number, since it is larger than the sum of its proper divisors (20789097).

28212375 is a wasteful number, since it uses less digits than its factorization.

28212375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3312 (or 3302 counting only the distinct ones).

The product of its digits is 6720, while the sum is 30.

The square root of 28212375 is about 5311.5322647989. The cubic root of 28212375 is about 304.4246971235.

The spelling of 28212375 in words is "twenty-eight million, two hundred twelve thousand, three hundred seventy-five".