28372693 has 2 divisors, whose sum is σ = 28372694. Its totient is φ = 28372692.

The previous prime is 28372679. The next prime is 28372709. The reversal of 28372693 is 39627382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22212369 + 6160324 = 4713^2 + 2482^2 .

It is a cyclic number.

It is not a de Polignac number, because 28372693 - 2⁵ = 28372661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28372093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14186346 + 14186347.

It is an arithmetic number, because the mean of its divisors is an integer number (14186347).

Almost surely, 2^28372693 is an apocalyptic number.

It is an amenable number.

28372693 is a deficient number, since it is larger than the sum of its proper divisors (1).

28372693 is an equidigital number, since it uses as much as digits as its factorization.

28372693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 40.

The square root of 28372693 is about 5326.6023880143. The cubic root of 28372693 is about 305.0002436619. Note that the first 3 decimals are identical.

The spelling of 28372693 in words is "twenty-eight million, three hundred seventy-two thousand, six hundred ninety-three".