28518147 has 18 divisors (see below), whose sum is σ = 47918988. Its totient is φ = 16295832.

The previous prime is 28518121. The next prime is 28518167. The reversal of 28518147 is 74181582.

It is not a de Polignac number, because 28518147 - 2¹¹ = 28516099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28518167) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 31893 + ... + 32774.

It is an arithmetic number, because the mean of its divisors is an integer number (2662166).

Almost surely, 2^28518147 is an apocalyptic number.

28518147 is a deficient number, since it is larger than the sum of its proper divisors (19400841).

28518147 is a wasteful number, since it uses less digits than its factorization.

28518147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64687 (or 64677 counting only the distinct ones).

The product of its digits is 17920, while the sum is 36.

The square root of 28518147 is about 5340.2384778210. The cubic root of 28518147 is about 305.5205550996.

The spelling of 28518147 in words is "twenty-eight million, five hundred eighteen thousand, one hundred forty-seven".