28373331 has 8 divisors (see below), whose sum is σ = 43235584. Its totient is φ = 16213320.

The previous prime is 28373311. The next prime is 28373333. The reversal of 28373331 is 13337382.

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

It is not a de Polignac number, because 28373331 - 2⁵ = 28373299 is a prime.

It is a super-2 number, since 2×28373331² = 1610091824071122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28373333) 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 7 ways as a sum of consecutive naturals, for example, 675535 + ... + 675576.

It is an arithmetic number, because the mean of its divisors is an integer number (5404448).

Almost surely, 2^28373331 is an apocalyptic number.

28373331 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

28373331 is a deficient number, since it is larger than the sum of its proper divisors (14862253).

28373331 is a wasteful number, since it uses less digits than its factorization.

28373331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1351121.

The product of its digits is 9072, while the sum is 30.

The square root of 28373331 is about 5326.6622757596. The cubic root of 28373331 is about 305.0025297649.

The spelling of 28373331 in words is "twenty-eight million, three hundred seventy-three thousand, three hundred thirty-one".