28471995 has 24 divisors (see below), whose sum is σ = 49982400. Its totient is φ = 14990976.

The previous prime is 28471987. The next prime is 28472021. The reversal of 28471995 is 59917482.

It is not a de Polignac number, because 28471995 - 2³ = 28471987 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 28471995.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 450 + ... + 7559.

It is an arithmetic number, because the mean of its divisors is an integer number (2082600).

Almost surely, 2^28471995 is an apocalyptic number.

28471995 is a deficient number, since it is larger than the sum of its proper divisors (21510405).

28471995 is a wasteful number, since it uses less digits than its factorization.

28471995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8099 (or 8096 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 28471995 is about 5335.9155727954. The cubic root of 28471995 is about 305.3556542746.

It can be divided in two parts, 2847 and 1995, that multiplied together give a palindrome (5679765).

The spelling of 28471995 in words is "twenty-eight million, four hundred seventy-one thousand, nine hundred ninety-five".