28997853 has 4 divisors (see below), whose sum is σ = 38663808. Its totient is φ = 19331900.

The previous prime is 28997833. The next prime is 28997861. The reversal of 28997853 is 35879982.

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 28997853 - 2⁹ = 28997341 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28997796 and 28997805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28997833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4832973 + ... + 4832978.

It is an arithmetic number, because the mean of its divisors is an integer number (9665952).

Almost surely, 2^28997853 is an apocalyptic number.

It is an amenable number.

28997853 is a deficient number, since it is larger than the sum of its proper divisors (9665955).

28997853 is an equidigital number, since it uses as much as digits as its factorization.

28997853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9665954.

The product of its digits is 1088640, while the sum is 51.

The square root of 28997853 is about 5384.9654594993. The cubic root of 28997853 is about 307.2241004686.

The spelling of 28997853 in words is "twenty-eight million, nine hundred ninety-seven thousand, eight hundred fifty-three".