33240040 has 64 divisors (see below), whose sum is σ = 77356800. Its totient is φ = 12849408.

The previous prime is 33240019. The next prime is 33240041. The reversal of 33240040 is 4004233.

It is a super-2 number, since 2×33240040² = 2209800518403200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33239996 and 33240023.

It is not an unprimeable number, because it can be changed into a prime (33240041) 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, 211642 + ... + 211798.

It is an arithmetic number, because the mean of its divisors is an integer number (1208700).

Almost surely, 2^33240040 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 33240040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38678400).

33240040 is an abundant number, since it is smaller than the sum of its proper divisors (44116760).

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

33240040 is a wasteful number, since it uses less digits than its factorization.

33240040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314 (or 310 counting only the distinct ones).

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

The square root of 33240040 is about 5765.4175911204. The cubic root of 33240040 is about 321.5292685796.

Adding to 33240040 its reverse (4004233), we get a palindrome (37244273).

The spelling of 33240040 in words is "thirty-three million, two hundred forty thousand, forty".