28710930 has 16 divisors (see below), whose sum is σ = 68906304. Its totient is φ = 7656240.

The previous prime is 28710917. The next prime is 28710949. The reversal of 28710930 is 3901782.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 957031 = 28710930 / (2 + 8 + 7 + 1 + 0 + 9 + 3 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 478486 + ... + 478545.

It is an arithmetic number, because the mean of its divisors is an integer number (4306644).

Almost surely, 2^28710930 is an apocalyptic number.

28710930 is an abundant number, since it is smaller than the sum of its proper divisors (40195374).

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

28710930 is a wasteful number, since it uses less digits than its factorization.

28710930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957041.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 28710930 is about 5358.2581124839. The cubic root of 28710930 is about 306.2074504262.

The spelling of 28710930 in words is "twenty-eight million, seven hundred ten thousand, nine hundred thirty".