28453693 has 2 divisors, whose sum is σ = 28453694. Its totient is φ = 28453692.

The previous prime is 28453679. The next prime is 28453709. The reversal of 28453693 is 39635482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28164249 + 289444 = 5307^2 + 538^2 .

It is a cyclic number.

It is not a de Polignac number, because 28453693 - 2¹⁷ = 28322621 is a prime.

It is a super-2 number, since 2×28453693² = 1619225290676498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28453673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14226846 + 14226847.

It is an arithmetic number, because the mean of its divisors is an integer number (14226847).

Almost surely, 2^28453693 is an apocalyptic number.

It is an amenable number.

28453693 is a deficient number, since it is larger than the sum of its proper divisors (1).

28453693 is an equidigital number, since it uses as much as digits as its factorization.

28453693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 40.

The square root of 28453693 is about 5334.2003149488. The cubic root of 28453693 is about 305.2902119914.

The spelling of 28453693 in words is "twenty-eight million, four hundred fifty-three thousand, six hundred ninety-three".