28773698 has 6 divisors (see below), whose sum is σ = 43171929. Its totient is φ = 14383056.

The previous prime is 28773697. The next prime is 28773709. The reversal of 28773698 is 89637782.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 25472209 + 3301489 = 5047^2 + 1817^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=3793.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (28773697) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 5690 + ... + 9482.

Almost surely, 2^28773698 is an apocalyptic number.

28773698 is a deficient number, since it is larger than the sum of its proper divisors (14398231).

28773698 is an frugal number, since it uses more digits than its factorization.

28773698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7588 (or 3795 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 50.

The square root of 28773698 is about 5364.1120420811. The cubic root of 28773698 is about 306.4304321724.

Multiplying 28773698 by its sum of digits (50), we get a square (1438684900 = 37930²).

The spelling of 28773698 in words is "twenty-eight million, seven hundred seventy-three thousand, six hundred ninety-eight".