28755825 has 24 divisors (see below), whose sum is σ = 54335808. Its totient is φ = 13145280.

The previous prime is 28755821. The next prime is 28755829. The reversal of 28755825 is 52855782.

It is an interprime number because it is at equal distance from previous prime (28755821) and next prime (28755829).

It is not a de Polignac number, because 28755825 - 2² = 28755821 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28755821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26862 + ... + 27911.

It is an arithmetic number, because the mean of its divisors is an integer number (2263992).

Almost surely, 2^28755825 is an apocalyptic number.

28755825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28755825 is a deficient number, since it is larger than the sum of its proper divisors (25579983).

28755825 is a wasteful number, since it uses less digits than its factorization.

28755825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54793 (or 54788 counting only the distinct ones).

The product of its digits is 224000, while the sum is 42.

The square root of 28755825 is about 5362.4458039219. The cubic root of 28755825 is about 306.3669718379.

The spelling of 28755825 in words is "twenty-eight million, seven hundred fifty-five thousand, eight hundred twenty-five".