28390333 has 8 divisors (see below), whose sum is σ = 29584800. Its totient is φ = 27210288.

The previous prime is 28390321. The next prime is 28390337. The reversal of 28390333 is 33309382.

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

It is a cyclic number.

It is not a de Polignac number, because 28390333 - 2⁵ = 28390301 is a prime.

It is a super-2 number, since 2×28390333² = 1612022015701778, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28390295 and 28390304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28390337) 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, 510 + ... + 7552.

It is an arithmetic number, because the mean of its divisors is an integer number (3698100).

Almost surely, 2^28390333 is an apocalyptic number.

It is an amenable number.

28390333 is a deficient number, since it is larger than the sum of its proper divisors (1194467).

28390333 is a wasteful number, since it uses less digits than its factorization.

28390333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7211.

The product of its (nonzero) digits is 11664, while the sum is 31.

The square root of 28390333 is about 5328.2579704815. The cubic root of 28390333 is about 305.0634392808.

The spelling of 28390333 in words is "twenty-eight million, three hundred ninety thousand, three hundred thirty-three".