33257440 has 48 divisors (see below), whose sum is σ = 83199312. Its totient is φ = 12519424.

The previous prime is 33257417. The next prime is 33257443. The reversal of 33257440 is 4475233.

It is a super-2 number, since 2×33257440² = 2212114630707200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33257399 and 33257408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33257443) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3394 + ... + 8833.

It is an arithmetic number, because the mean of its divisors is an integer number (1733319).

Almost surely, 2^33257440 is an apocalyptic number.

It is an amenable number.

33257440 is an abundant number, since it is smaller than the sum of its proper divisors (49941872).

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

33257440 is a wasteful number, since it uses less digits than its factorization.

33257440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12259 (or 12251 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 28.

The square root of 33257440 is about 5766.9263910683. The cubic root of 33257440 is about 321.5853619073.

The spelling of 33257440 in words is "thirty-three million, two hundred fifty-seven thousand, four hundred forty".