28706425 has 24 divisors (see below), whose sum is σ = 39676032. Its totient is φ = 20424000.

The previous prime is 28706401. The next prime is 28706429. The reversal of 28706425 is 52460782.

It is not a de Polignac number, because 28706425 - 2¹⁵ = 28673657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28706429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11815 + ... + 14035.

It is an arithmetic number, because the mean of its divisors is an integer number (1653168).

Almost surely, 2^28706425 is an apocalyptic number.

28706425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28706425 is a deficient number, since it is larger than the sum of its proper divisors (10969607).

28706425 is a wasteful number, since it uses less digits than its factorization.

28706425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2289 (or 2284 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 28706425 is about 5357.8377168406. The cubic root of 28706425 is about 306.1914340320.

The spelling of 28706425 in words is "twenty-eight million, seven hundred six thousand, four hundred twenty-five".