28700265 has 48 divisors (see below), whose sum is σ = 52049088. Its totient is φ = 13392000.

The previous prime is 28700257. The next prime is 28700311. The reversal of 28700265 is 56200782.

It is not a de Polignac number, because 28700265 - 2³ = 28700257 is a prime.

It is a super-2 number, since 2×28700265² = 1647410422140450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 158475 + ... + 158655.

It is an arithmetic number, because the mean of its divisors is an integer number (1084356).

Almost surely, 2^28700265 is an apocalyptic number.

It is an amenable number.

28700265 is a deficient number, since it is larger than the sum of its proper divisors (23348823).

28700265 is a wasteful number, since it uses less digits than its factorization.

28700265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262 (or 231 counting only the distinct ones).

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

The square root of 28700265 is about 5357.2628272281. The cubic root of 28700265 is about 306.1695309892.

The spelling of 28700265 in words is "twenty-eight million, seven hundred thousand, two hundred sixty-five".