28819425 has 12 divisors (see below), whose sum is σ = 47648240. Its totient is φ = 15370320.

The previous prime is 28819423. The next prime is 28819459. The reversal of 28819425 is 52491882.

It is not a de Polignac number, because 28819425 - 2¹ = 28819423 is a prime.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (28819423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 192055 + ... + 192204.

Almost surely, 2^28819425 is an apocalyptic number.

28819425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28819425 is a deficient number, since it is larger than the sum of its proper divisors (18828815).

28819425 is a wasteful number, since it uses less digits than its factorization.

28819425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384272 (or 384267 counting only the distinct ones).

The product of its digits is 46080, while the sum is 39.

The square root of 28819425 is about 5368.3726584506. The cubic root of 28819425 is about 306.5926721024.

The spelling of 28819425 in words is "twenty-eight million, eight hundred nineteen thousand, four hundred twenty-five".