28094740 has 12 divisors (see below), whose sum is σ = 58998996. Its totient is φ = 11237888.

The previous prime is 28094713. The next prime is 28094741. The reversal of 28094740 is 4749082.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5035536 + 23059204 = 2244^2 + 4802^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28094696 and 28094705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28094741) by changing a digit.

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, 702349 + ... + 702388.

It is an arithmetic number, because the mean of its divisors is an integer number (4916583).

Almost surely, 2^28094740 is an apocalyptic number.

28094740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28094740 is an abundant number, since it is smaller than the sum of its proper divisors (30904256).

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

28094740 is a wasteful number, since it uses less digits than its factorization.

28094740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1404746 (or 1404744 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 28094740 is about 5300.4471509487. The cubic root of 28094740 is about 304.0009954954. Note that the first 3 decimals are identical.

The spelling of 28094740 in words is "twenty-eight million, ninety-four thousand, seven hundred forty".