33423530 has 32 divisors (see below), whose sum is σ = 72804096. Its totient is φ = 10785024.

The previous prime is 33423517. The next prime is 33423539. The reversal of 33423530 is 3532433.

It is a super-2 number, since 2×33423530² = 2234264715321800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33423496 and 33423505.

It is not an unprimeable number, because it can be changed into a prime (33423539) 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, 12854 + ... + 15233.

It is an arithmetic number, because the mean of its divisors is an integer number (2275128).

Almost surely, 2^33423530 is an apocalyptic number.

33423530 is an abundant number, since it is smaller than the sum of its proper divisors (39380566).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33423530 is a wasteful number, since it uses less digits than its factorization.

33423530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28118.

The product of its (nonzero) digits is 3240, while the sum is 23.

The square root of 33423530 is about 5781.3086753779. The cubic root of 33423530 is about 322.1198131861.

Adding to 33423530 its reverse (3532433), we get a palindrome (36955963).

The spelling of 33423530 in words is "thirty-three million, four hundred twenty-three thousand, five hundred thirty".