28502275 has 6 divisors (see below), whose sum is σ = 35342852. Its totient is φ = 22801800.

The previous prime is 28502239. The next prime is 28502281. The reversal of 28502275 is 57220582.

It is not a de Polignac number, because 28502275 - 2¹³ = 28494083 is a prime.

It is a super-3 number, since 3×28502275³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 570021 + ... + 570070.

Almost surely, 2^28502275 is an apocalyptic number.

28502275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28502275 is a deficient number, since it is larger than the sum of its proper divisors (6840577).

28502275 is a wasteful number, since it uses less digits than its factorization.

28502275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140101 (or 1140096 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 31.

The square root of 28502275 is about 5338.7521950358. The cubic root of 28502275 is about 305.4638646216.

The spelling of 28502275 in words is "twenty-eight million, five hundred two thousand, two hundred seventy-five".