28333631 has 8 divisors (see below), whose sum is σ = 29860704. Its totient is φ = 26831200.

The previous prime is 28333619. The next prime is 28333637. The reversal of 28333631 is 13633382.

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 28333631 - 2⁶ = 28333567 is a prime.

It is a super-2 number, since 2×28333631² = 1605589291288322, 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 = 28333594 and 28333603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28333637) 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, 3776 + ... + 8421.

It is an arithmetic number, because the mean of its divisors is an integer number (3732588).

Almost surely, 2^28333631 is an apocalyptic number.

28333631 is a deficient number, since it is larger than the sum of its proper divisors (1527073).

28333631 is a wasteful number, since it uses less digits than its factorization.

28333631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12321.

The product of its digits is 7776, while the sum is 29.

The square root of 28333631 is about 5322.9344350649. The cubic root of 28333631 is about 304.8602100601.

The spelling of 28333631 in words is "twenty-eight million, three hundred thirty-three thousand, six hundred thirty-one".