28302890 has 96 divisors (see below), whose sum is σ = 66484800. Its totient is φ = 8574720.

The previous prime is 28302851. The next prime is 28302899. The reversal of 28302890 is 9820382.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28302899) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 317966 + ... + 318054.

It is an arithmetic number, because the mean of its divisors is an integer number (692550).

Almost surely, 2^28302890 is an apocalyptic number.

28302890 is an abundant number, since it is smaller than the sum of its proper divisors (38181910).

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

28302890 is a wasteful number, since it uses less digits than its factorization.

28302890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 28302890 is about 5320.0460524323. The cubic root of 28302890 is about 304.7499159354.

It can be divided in two parts, 28302 and 890, that added together give a palindrome (29192).

The spelling of 28302890 in words is "twenty-eight million, three hundred two thousand, eight hundred ninety".