28630830 has 32 divisors (see below), whose sum is σ = 71085600. Its totient is φ = 7371392.

The previous prime is 28630813. The next prime is 28630831. The reversal of 28630830 is 3803682.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28630831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15585 + ... + 17324.

It is an arithmetic number, because the mean of its divisors is an integer number (2221425).

Almost surely, 2^28630830 is an apocalyptic number.

28630830 is an abundant number, since it is smaller than the sum of its proper divisors (42454770).

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

28630830 is a wasteful number, since it uses less digits than its factorization.

28630830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32948.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 28630830 is about 5350.7784480391. The cubic root of 28630830 is about 305.9224246942.

The spelling of 28630830 in words is "twenty-eight million, six hundred thirty thousand, eight hundred thirty".