33057540 has 72 divisors (see below), whose sum is σ = 102630528. Its totient is φ = 8608320.

The previous prime is 33057533. The next prime is 33057551. The reversal of 33057540 is 4575033.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5605 + ... + 9875.

It is an arithmetic number, because the mean of its divisors is an integer number (1425424).

Almost surely, 2^33057540 is an apocalyptic number.

33057540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33057540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51315264).

33057540 is an abundant number, since it is smaller than the sum of its proper divisors (69572988).

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

33057540 is a wasteful number, since it uses less digits than its factorization.

33057540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4329 (or 4324 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 27.

The square root of 33057540 is about 5749.5686794750. The cubic root of 33057540 is about 320.9397505347.

The spelling of 33057540 in words is "thirty-three million, fifty-seven thousand, five hundred forty".