33240540 has 48 divisors (see below), whose sum is σ = 94838688. Its totient is φ = 8696064.

The previous prime is 33240539. The next prime is 33240551. The reversal of 33240540 is 4504233.

It is a happy number.

It is a super-2 number, since 2×33240540² = 2209866998983200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2047 + ... + 8406.

It is an arithmetic number, because the mean of its divisors is an integer number (1975806).

Almost surely, 2^33240540 is an apocalyptic number.

33240540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

33240540 is an abundant number, since it is smaller than the sum of its proper divisors (61598148).

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

33240540 is a wasteful number, since it uses less digits than its factorization.

33240540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10518 (or 10516 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 33240540 is about 5765.4609529508. The cubic root of 33240540 is about 321.5308807300.

Adding to 33240540 its reverse (4504233), we get a palindrome (37744773).

The spelling of 33240540 in words is "thirty-three million, two hundred forty thousand, five hundred forty".