28083620 has 12 divisors (see below), whose sum is σ = 58975644. Its totient is φ = 11233440.

The previous prime is 28083599. The next prime is 28083641. The reversal of 28083620 is 2638082.

It is an interprime number because it is at equal distance from previous prime (28083599) and next prime (28083641).

It can be written as a sum of positive squares in 2 ways, for example, as 4502884 + 23580736 = 2122^2 + 4856^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 702071 + ... + 702110.

It is an arithmetic number, because the mean of its divisors is an integer number (4914637).

Almost surely, 2^28083620 is an apocalyptic number.

28083620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28083620 is an abundant number, since it is smaller than the sum of its proper divisors (30892024).

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

28083620 is a wasteful number, since it uses less digits than its factorization.

28083620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1404190 (or 1404188 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 28083620 is about 5299.3980790275. The cubic root of 28083620 is about 303.9608819703.

The spelling of 28083620 in words is "twenty-eight million, eighty-three thousand, six hundred twenty".