33040420 has 96 divisors (see below), whose sum is σ = 85671936. Its totient is φ = 10454400.

The previous prime is 33040393. The next prime is 33040421. The reversal of 33040420 is 2404033.

It is a junction number, because it is equal to n+sod(n) for n = 33040394 and 33040403.

It is not an unprimeable number, because it can be changed into a prime (33040421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99655 + ... + 99985.

It is an arithmetic number, because the mean of its divisors is an integer number (892416).

Almost surely, 2^33040420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33040420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42835968).

33040420 is an abundant number, since it is smaller than the sum of its proper divisors (52631516).

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

33040420 is a wasteful number, since it uses less digits than its factorization.

33040420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401 (or 399 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 33040420 is about 5748.0796793364. The cubic root of 33040420 is about 320.8843376868.

Adding to 33040420 its reverse (2404033), we get a palindrome (35444453).

The spelling of 33040420 in words is "thirty-three million, forty thousand, four hundred twenty".