28425547 has 4 divisors (see below), whose sum is σ = 30097656. Its totient is φ = 26753440.

The previous prime is 28425517. The next prime is 28425557. The reversal of 28425547 is 74552482.

It is a happy number.

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 28425547 - 2¹⁵ = 28392779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28425517) 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, 836029 + ... + 836062.

It is an arithmetic number, because the mean of its divisors is an integer number (7524414).

Almost surely, 2^28425547 is an apocalyptic number.

28425547 is a deficient number, since it is larger than the sum of its proper divisors (1672109).

28425547 is a wasteful number, since it uses less digits than its factorization.

28425547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1672108.

The product of its digits is 89600, while the sum is 37.

The square root of 28425547 is about 5331.5614035665. The cubic root of 28425547 is about 305.1895158285.

The spelling of 28425547 in words is "twenty-eight million, four hundred twenty-five thousand, five hundred forty-seven".