28630822 has 32 divisors (see below), whose sum is σ = 50971680. Its totient is φ = 11911680.

The previous prime is 28630813. The next prime is 28630831. The reversal of 28630822 is 22803682.

It is an interprime number because it is at equal distance from previous prime (28630813) and next prime (28630831).

It is a congruent number.

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, 12804 + ... + 14872.

It is an arithmetic number, because the mean of its divisors is an integer number (1592865).

Almost surely, 2^28630822 is an apocalyptic number.

28630822 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28630822 is a deficient number, since it is larger than the sum of its proper divisors (22340858).

28630822 is a wasteful number, since it uses less digits than its factorization.

28630822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2136.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 28630822 is about 5350.7777004843. Note that the first 4 decimals coincide. The cubic root of 28630822 is about 305.9223962007.

The spelling of 28630822 in words is "twenty-eight million, six hundred thirty thousand, eight hundred twenty-two".