33790821 has 8 divisors (see below), whose sum is σ = 45081984. Its totient is φ = 22513440.

The previous prime is 33790789. The next prime is 33790853. The reversal of 33790821 is 12809733.

It is an interprime number because it is at equal distance from previous prime (33790789) and next prime (33790853).

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

It is not a de Polignac number, because 33790821 - 2⁵ = 33790789 is a prime.

It is a super-2 number, since 2×33790821² = 2283639167708082, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33790871) 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, 5905 + ... + 10121.

It is an arithmetic number, because the mean of its divisors is an integer number (5635248).

Almost surely, 2^33790821 is an apocalyptic number.

It is an amenable number.

33790821 is a deficient number, since it is larger than the sum of its proper divisors (11291163).

33790821 is a wasteful number, since it uses less digits than its factorization.

33790821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6891.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 33790821 is about 5812.9872698983. The cubic root of 33790821 is about 323.2954416455.

The spelling of 33790821 in words is "thirty-three million, seven hundred ninety thousand, eight hundred twenty-one".