28397995 has 8 divisors (see below), whose sum is σ = 34266960. Its totient is φ = 22592160.

The previous prime is 28397987. The next prime is 28398037. The reversal of 28397995 is 59979382.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28397995 - 2³ = 28397987 is a prime.

It is a super-2 number, since 2×28397995² = 1612892240040050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14785 + ... + 16594.

It is an arithmetic number, because the mean of its divisors is an integer number (4283370).

Almost surely, 2^28397995 is an apocalyptic number.

28397995 is a deficient number, since it is larger than the sum of its proper divisors (5868965).

28397995 is a wasteful number, since it uses less digits than its factorization.

28397995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31565.

The product of its digits is 1224720, while the sum is 52.

The square root of 28397995 is about 5328.9769186965. The cubic root of 28397995 is about 305.0908803800.

It can be divided in two parts, 28397 and 995, that added together give a palindrome (29392).

The spelling of 28397995 in words is "twenty-eight million, three hundred ninety-seven thousand, nine hundred ninety-five".