28625147 has 4 divisors (see below), whose sum is σ = 29052456. Its totient is φ = 28197840.

The previous prime is 28625131. The next prime is 28625171. The reversal of 28625147 is 74152682.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28625147 - 2⁴ = 28625131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28625347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213554 + ... + 213687.

It is an arithmetic number, because the mean of its divisors is an integer number (7263114).

Almost surely, 2^28625147 is an apocalyptic number.

28625147 is a deficient number, since it is larger than the sum of its proper divisors (427309).

28625147 is an equidigital number, since it uses as much as digits as its factorization.

28625147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427308.

The product of its digits is 26880, while the sum is 35.

The square root of 28625147 is about 5350.2473774584. The cubic root of 28625147 is about 305.9021822705.

The spelling of 28625147 in words is "twenty-eight million, six hundred twenty-five thousand, one hundred forty-seven".