28313235 has 24 divisors (see below), whose sum is σ = 49209264. Its totient is φ = 15059520.

The previous prime is 28313231. The next prime is 28313239. The reversal of 28313235 is 53231382.

It is an interprime number because it is at equal distance from previous prime (28313231) and next prime (28313239).

It is not a de Polignac number, because 28313235 - 2² = 28313231 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28313199 and 28313208.

It is not an unprimeable number, because it can be changed into a prime (28313231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23764 + ... + 24926.

It is an arithmetic number, because the mean of its divisors is an integer number (2050386).

Almost surely, 2^28313235 is an apocalyptic number.

28313235 is a deficient number, since it is larger than the sum of its proper divisors (20896029).

28313235 is a wasteful number, since it uses less digits than its factorization.

28313235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1715 (or 1712 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 28313235 is about 5321.0182296249. The cubic root of 28313235 is about 304.7870411648.

The spelling of 28313235 in words is "twenty-eight million, three hundred thirteen thousand, two hundred thirty-five".