28053397 has 4 divisors (see below), whose sum is σ = 28255360. Its totient is φ = 27851436.

The previous prime is 28053343. The next prime is 28053401. The reversal of 28053397 is 79335082.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28053397 - 2¹⁹ = 27529109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28057397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100773 + ... + 101050.

It is an arithmetic number, because the mean of its divisors is an integer number (7063840).

Almost surely, 2^28053397 is an apocalyptic number.

It is an amenable number.

28053397 is a deficient number, since it is larger than the sum of its proper divisors (201963).

28053397 is a wasteful number, since it uses less digits than its factorization.

28053397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201962.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 28053397 is about 5296.5457611542. The cubic root of 28053397 is about 303.8518040667.

The spelling of 28053397 in words is "twenty-eight million, fifty-three thousand, three hundred ninety-seven".