28773825 has 12 divisors (see below), whose sum is σ = 47572848. Its totient is φ = 15346000.

The previous prime is 28773821. The next prime is 28773853. The reversal of 28773825 is 52837782.

It is not a de Polignac number, because 28773825 - 2² = 28773821 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28773821) 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 11 ways as a sum of consecutive naturals, for example, 191751 + ... + 191900.

It is an arithmetic number, because the mean of its divisors is an integer number (3964404).

Almost surely, 2^28773825 is an apocalyptic number.

28773825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28773825 is a deficient number, since it is larger than the sum of its proper divisors (18799023).

28773825 is a wasteful number, since it uses less digits than its factorization.

28773825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383664 (or 383659 counting only the distinct ones).

The product of its digits is 188160, while the sum is 42.

The square root of 28773825 is about 5364.1238800013. The cubic root of 28773825 is about 306.4308830079.

The spelling of 28773825 in words is "twenty-eight million, seven hundred seventy-three thousand, eight hundred twenty-five".