28214975 has 6 divisors (see below), whose sum is σ = 34986600. Its totient is φ = 22571960.

The previous prime is 28214971. The next prime is 28214983. The reversal of 28214975 is 57941282.

It is not a de Polignac number, because 28214975 - 2² = 28214971 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28214971) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 564275 + ... + 564324.

It is an arithmetic number, because the mean of its divisors is an integer number (5831100).

Almost surely, 2^28214975 is an apocalyptic number.

28214975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28214975 is a deficient number, since it is larger than the sum of its proper divisors (6771625).

28214975 is a wasteful number, since it uses less digits than its factorization.

28214975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128609 (or 1128604 counting only the distinct ones).

The product of its digits is 40320, while the sum is 38.

The square root of 28214975 is about 5311.7770096268. Note that the first 3 decimals coincide. The cubic root of 28214975 is about 304.4340485742.

The spelling of 28214975 in words is "twenty-eight million, two hundred fourteen thousand, nine hundred seventy-five".