28242693 has 12 divisors (see below), whose sum is σ = 41565420. Its totient is φ = 18472896.

The previous prime is 28242691. The next prime is 28242713. The reversal of 28242693 is 39624282.

It can be written as a sum of positive squares in 2 ways, for example, as 18301284 + 9941409 = 4278^2 + 3153^2 .

It is not a de Polignac number, because 28242693 - 2¹ = 28242691 is a prime.

It is a hoax number, since the sum of its digits (36) 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 (28242691) 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, 29128 + ... + 30081.

It is an arithmetic number, because the mean of its divisors is an integer number (3463785).

Almost surely, 2^28242693 is an apocalyptic number.

It is an amenable number.

28242693 is a deficient number, since it is larger than the sum of its proper divisors (13322727).

28242693 is a wasteful number, since it uses less digits than its factorization.

28242693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59268 (or 59265 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 28242693 is about 5314.3854771742. The cubic root of 28242693 is about 304.5337065424.

The spelling of 28242693 in words is "twenty-eight million, two hundred forty-two thousand, six hundred ninety-three".