28325388 has 48 divisors (see below), whose sum is σ = 81347840. Its totient is φ = 7470144.

The previous prime is 28325377. The next prime is 28325393. The reversal of 28325388 is 88352382.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11878 + ... + 14061.

Almost surely, 2^28325388 is an apocalyptic number.

28325388 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28325388 is an abundant number, since it is smaller than the sum of its proper divisors (53022452).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28325388 is a wasteful number, since it uses less digits than its factorization.

28325388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25966 (or 25964 counting only the distinct ones).

The product of its digits is 92160, while the sum is 39.

The square root of 28325388 is about 5322.1600877839. The cubic root of 28325388 is about 304.8306432360.

The spelling of 28325388 in words is "twenty-eight million, three hundred twenty-five thousand, three hundred eighty-eight".