28997373 has 8 divisors (see below), whose sum is σ = 39606336. Its totient is φ = 18860000.

The previous prime is 28997347. The next prime is 28997377. The reversal of 28997373 is 37379982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28997373 - 2⁵ = 28997341 is a prime.

It is a super-2 number, since 2×28997373² = 1681695281802258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28997377) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117753 + ... + 117998.

It is an arithmetic number, because the mean of its divisors is an integer number (4950792).

Almost surely, 2^28997373 is an apocalyptic number.

It is an amenable number.

28997373 is a deficient number, since it is larger than the sum of its proper divisors (10608963).

28997373 is a wasteful number, since it uses less digits than its factorization.

28997373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235795.

The product of its digits is 571536, while the sum is 48.

The square root of 28997373 is about 5384.9208907838. The cubic root of 28997373 is about 307.2224053042. Note that the first 3 decimals are identical.

The spelling of 28997373 in words is "twenty-eight million, nine hundred ninety-seven thousand, three hundred seventy-three".