28819895 has 16 divisors (see below), whose sum is σ = 37467360. Its totient is φ = 21154944.

The previous prime is 28819837. The next prime is 28819909. The reversal of 28819895 is 59891882.

It is a cyclic number.

It is not a de Polignac number, because 28819895 - 2⁸ = 28819639 is a prime.

It is a super-2 number, since 2×28819895² = 1661172695622050, 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 15 ways as a sum of consecutive naturals, for example, 10397 + ... + 12873.

It is an arithmetic number, because the mean of its divisors is an integer number (2341710).

Almost surely, 2^28819895 is an apocalyptic number.

28819895 is a deficient number, since it is larger than the sum of its proper divisors (8647465).

28819895 is a wasteful number, since it uses less digits than its factorization.

28819895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2674.

The product of its digits is 414720, while the sum is 50.

The square root of 28819895 is about 5368.4164331765. The cubic root of 28819895 is about 306.5943387765.

The spelling of 28819895 in words is "twenty-eight million, eight hundred nineteen thousand, eight hundred ninety-five".