28333090 has 8 divisors (see below), whose sum is σ = 50999580. Its totient is φ = 11333232.

The previous prime is 28333069. The next prime is 28333093. The reversal of 28333090 is 9033382.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 26409321 + 1923769 = 5139^2 + 1387^2 .

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

It is not an unprimeable number, because it can be changed into a prime (28333093) 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, 1416645 + ... + 1416664.

Almost surely, 2^28333090 is an apocalyptic number.

28333090 is a deficient number, since it is larger than the sum of its proper divisors (22666490).

28333090 is a wasteful number, since it uses less digits than its factorization.

28333090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2833316.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 28333090 is about 5322.8836169881. The cubic root of 28333090 is about 304.8582697225.

The spelling of 28333090 in words is "twenty-eight million, three hundred thirty-three thousand, ninety".