33406491 has 8 divisors (see below), whose sum is σ = 44867664. Its totient is φ = 22108160.

The previous prime is 33406489. The next prime is 33406501. The reversal of 33406491 is 19460433.

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 33406491 - 2¹ = 33406489 is a prime.

It is a super-2 number, since 2×33406491² = 2231987281866162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33406481) 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, 40230 + ... + 41051.

It is an arithmetic number, because the mean of its divisors is an integer number (5608458).

Almost surely, 2^33406491 is an apocalyptic number.

33406491 is a deficient number, since it is larger than the sum of its proper divisors (11461173).

33406491 is a wasteful number, since it uses less digits than its factorization.

33406491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81421.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 33406491 is about 5779.8348592326. The cubic root of 33406491 is about 322.0650660021.

The spelling of 33406491 in words is "thirty-three million, four hundred six thousand, four hundred ninety-one".