28190453 has 2 divisors, whose sum is σ = 28190454. Its totient is φ = 28190452.

The previous prime is 28190443. The next prime is 28190473. The reversal of 28190453 is 35409182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28121809 + 68644 = 5303^2 + 262^2 .

It is a cyclic number.

It is not a de Polignac number, because 28190453 - 2⁶ = 28190389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28190423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14095226 + 14095227.

It is an arithmetic number, because the mean of its divisors is an integer number (14095227).

Almost surely, 2^28190453 is an apocalyptic number.

It is an amenable number.

28190453 is a deficient number, since it is larger than the sum of its proper divisors (1).

28190453 is an equidigital number, since it uses as much as digits as its factorization.

28190453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 28190453 is about 5309.4682407940. The cubic root of 28190453 is about 304.3458271537.

The spelling of 28190453 in words is "twenty-eight million, one hundred ninety thousand, four hundred fifty-three".