33381790 has 32 divisors (see below), whose sum is σ = 66298176. Its totient is φ = 12023040.

The previous prime is 33381781. The next prime is 33381791. The reversal of 33381790 is 9718333.

It is a super-2 number, since 2×33381790² = 2228687807208200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33381791) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2199 + ... + 8461.

It is an arithmetic number, because the mean of its divisors is an integer number (2071818).

Almost surely, 2^33381790 is an apocalyptic number.

33381790 is a deficient number, since it is larger than the sum of its proper divisors (32916386).

33381790 is a wasteful number, since it uses less digits than its factorization.

33381790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6324.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 33381790 is about 5777.6976383331. The cubic root of 33381790 is about 321.9856673532.

The spelling of 33381790 in words is "thirty-three million, three hundred eighty-one thousand, seven hundred ninety".