28472895 has 48 divisors (see below), whose sum is σ = 54486432. Its totient is φ = 13639680.

The previous prime is 28472893. The next prime is 28472947. The reversal of 28472895 is 59827482.

It is a Cunningham number, because it is equal to 5336²-1.

It is not a de Polignac number, because 28472895 - 2¹ = 28472893 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 28472895.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28472891) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 47719 + ... + 48311.

It is an arithmetic number, because the mean of its divisors is an integer number (1135134).

Almost surely, 2^28472895 is an apocalyptic number.

28472895 is a deficient number, since it is larger than the sum of its proper divisors (26013537).

28472895 is a wasteful number, since it uses less digits than its factorization.

28472895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712 (or 709 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 28472895 is about 5335.9999062969. Note that the first 4 decimals coincide. The cubic root of 28472895 is about 305.3588716723.

The spelling of 28472895 in words is "twenty-eight million, four hundred seventy-two thousand, eight hundred ninety-five".