28513895 has 16 divisors (see below), whose sum is σ = 34836480. Its totient is φ = 22402464.

The previous prime is 28513883. The next prime is 28513897. The reversal of 28513895 is 59831582.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28513895 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28513897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119186 + ... + 119424.

It is an arithmetic number, because the mean of its divisors is an integer number (2177280).

Almost surely, 2^28513895 is an apocalyptic number.

28513895 is a deficient number, since it is larger than the sum of its proper divisors (6322585).

28513895 is a wasteful number, since it uses less digits than its factorization.

28513895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574.

The product of its digits is 86400, while the sum is 41.

The square root of 28513895 is about 5339.8403534188. The cubic root of 28513895 is about 305.5053701723.

The spelling of 28513895 in words is "twenty-eight million, five hundred thirteen thousand, eight hundred ninety-five".