28074213 has 12 divisors (see below), whose sum is σ = 41217228. Its totient is φ = 18408960.

The previous prime is 28074209. The next prime is 28074223. The reversal of 28074213 is 31247082.

It can be written as a sum of positive squares in 2 ways, for example, as 12723489 + 15350724 = 3567^2 + 3918^2 .

It is not a de Polignac number, because 28074213 - 2² = 28074209 is a prime.

It is a super-2 number, since 2×28074213² = 1576322871138738, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28074223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25020 + ... + 26117.

It is an arithmetic number, because the mean of its divisors is an integer number (3434769).

Almost surely, 2^28074213 is an apocalyptic number.

It is an amenable number.

28074213 is a deficient number, since it is larger than the sum of its proper divisors (13143015).

28074213 is a wasteful number, since it uses less digits than its factorization.

28074213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51204 (or 51201 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 28074213 is about 5298.5104510608. The cubic root of 28074213 is about 303.9269395353.

The spelling of 28074213 in words is "twenty-eight million, seventy-four thousand, two hundred thirteen".