33604540 has 48 divisors (see below), whose sum is σ = 74833920. Its totient is φ = 12640320.

The previous prime is 33604537. The next prime is 33604553. The reversal of 33604540 is 4540633.

It is a super-2 number, since 2×33604540² = 2258530217223200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72349 + ... + 72811.

It is an arithmetic number, because the mean of its divisors is an integer number (1559040).

Almost surely, 2^33604540 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 33604540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37416960).

33604540 is an abundant number, since it is smaller than the sum of its proper divisors (41229380).

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

33604540 is a wasteful number, since it uses less digits than its factorization.

33604540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682 (or 680 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 33604540 is about 5796.9422974530. The cubic root of 33604540 is about 322.7002622132.

The spelling of 33604540 in words is "thirty-three million, six hundred four thousand, five hundred forty".