28194061 has 12 divisors (see below), whose sum is σ = 33929820. Its totient is φ = 23331840.

The previous prime is 28194059. The next prime is 28194071. The reversal of 28194061 is 16049182.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5336100 + 22857961 = 2310^2 + 4781^2 .

It is not a de Polignac number, because 28194061 - 2¹ = 28194059 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28194011) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 8500 + ... + 11341.

It is an arithmetic number, because the mean of its divisors is an integer number (2827485).

Almost surely, 2^28194061 is an apocalyptic number.

It is an amenable number.

28194061 is a deficient number, since it is larger than the sum of its proper divisors (5735759).

28194061 is a wasteful number, since it uses less digits than its factorization.

28194061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19884 (or 19877 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 28194061 is about 5309.8080002953. The cubic root of 28194061 is about 304.3588106615.

The spelling of 28194061 in words is "twenty-eight million, one hundred ninety-four thousand, sixty-one".