28705995 has 20 divisors (see below), whose sum is σ = 51458880. Its totient is φ = 15309648.

The previous prime is 28705961. The next prime is 28706003. The reversal of 28705995 is 59950782.

It is a happy number.

It is not a de Polignac number, because 28705995 - 2⁶ = 28705931 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 28705995.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 35035 + ... + 35844.

It is an arithmetic number, because the mean of its divisors is an integer number (2572944).

Almost surely, 2^28705995 is an apocalyptic number.

28705995 is a deficient number, since it is larger than the sum of its proper divisors (22752885).

28705995 is an equidigital number, since it uses as much as digits as its factorization.

28705995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70896 (or 70887 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 45.

The square root of 28705995 is about 5357.7975885619. The cubic root of 28705995 is about 306.1899051875.

The spelling of 28705995 in words is "twenty-eight million, seven hundred five thousand, nine hundred ninety-five".