28194020 has 24 divisors (see below), whose sum is σ = 59821944. Its totient is φ = 11160576.

The previous prime is 28194011. The next prime is 28194059. The reversal of 28194020 is 2049182.

It can be written as a sum of positive squares in 4 ways, for example, as 3013696 + 25180324 = 1736^2 + 5018^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5327 + ... + 9206.

It is an arithmetic number, because the mean of its divisors is an integer number (2492581).

Almost surely, 2^28194020 is an apocalyptic number.

28194020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28194020 is an abundant number, since it is smaller than the sum of its proper divisors (31627924).

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

28194020 is a wasteful number, since it uses less digits than its factorization.

28194020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14639 (or 14637 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 28194020 is about 5309.8041395140. The cubic root of 28194020 is about 304.3586631279.

The spelling of 28194020 in words is "twenty-eight million, one hundred ninety-four thousand, twenty".