28786425 has 24 divisors (see below), whose sum is σ = 50100960. Its totient is φ = 14544000.

The previous prime is 28786403. The next prime is 28786441. The reversal of 28786425 is 52468782.

It is a happy number.

It is not a de Polignac number, because 28786425 - 2¹⁰ = 28785401 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8676 + ... + 11525.

It is an arithmetic number, because the mean of its divisors is an integer number (2087540).

Almost surely, 2^28786425 is an apocalyptic number.

28786425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28786425 is a deficient number, since it is larger than the sum of its proper divisors (21314535).

28786425 is a wasteful number, since it uses less digits than its factorization.

28786425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20233 (or 20228 counting only the distinct ones).

The product of its digits is 215040, while the sum is 42.

The square root of 28786425 is about 5365.2982209752. The cubic root of 28786425 is about 306.4756049694.

The spelling of 28786425 in words is "twenty-eight million, seven hundred eighty-six thousand, four hundred twenty-five".