28319995 has 16 divisors (see below), whose sum is σ = 37195488. Its totient is φ = 20528640.

The previous prime is 28319981. The next prime is 28320001. The reversal of 28319995 is 59991382.

It is not a de Polignac number, because 28319995 - 2⁷ = 28319867 is a prime.

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, 21187 + ... + 22483.

It is an arithmetic number, because the mean of its divisors is an integer number (2324718).

Almost surely, 2^28319995 is an apocalyptic number.

28319995 is a deficient number, since it is larger than the sum of its proper divisors (8875493).

28319995 is a wasteful number, since it uses less digits than its factorization.

28319995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1710.

The product of its digits is 174960, while the sum is 46.

The square root of 28319995 is about 5321.6534084812. The cubic root of 28319995 is about 304.8112959753.

It can be divided in two parts, 28 and 319995, that added together give a palindrome (320023).

The spelling of 28319995 in words is "twenty-eight million, three hundred nineteen thousand, nine hundred ninety-five".