28074669 has 16 divisors (see below), whose sum is σ = 42885120. Its totient is φ = 16003440.

The previous prime is 28074661. The next prime is 28074671. The reversal of 28074669 is 96647082.

It is not a de Polignac number, because 28074669 - 2³ = 28074661 is a prime.

It is a super-2 number, since 2×28074669² = 1576374078919122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28074669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28074661) 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 15 ways as a sum of consecutive naturals, for example, 8664 + ... + 11454.

It is an arithmetic number, because the mean of its divisors is an integer number (2680320).

Almost surely, 2^28074669 is an apocalyptic number.

It is an amenable number.

28074669 is a deficient number, since it is larger than the sum of its proper divisors (14810451).

28074669 is a wasteful number, since it uses less digits than its factorization.

28074669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3280.

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 28074669 is about 5298.5534818477. The cubic root of 28074669 is about 303.9285850541.

The spelling of 28074669 in words is "twenty-eight million, seventy-four thousand, six hundred sixty-nine".