33540640 has 48 divisors (see below), whose sum is σ = 90562752. Its totient is φ = 11499264.

The previous prime is 33540623. The next prime is 33540659. The reversal of 33540640 is 4604533.

It is a super-2 number, since 2×33540640² = 2249949063219200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13854 + ... + 16093.

It is an arithmetic number, because the mean of its divisors is an integer number (1886724).

Almost surely, 2^33540640 is an apocalyptic number.

It is an amenable number.

33540640 is an abundant number, since it is smaller than the sum of its proper divisors (57022112).

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

33540640 is a wasteful number, since it uses less digits than its factorization.

33540640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29969 (or 29961 counting only the distinct ones).

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

The square root of 33540640 is about 5791.4281485658. The cubic root of 33540640 is about 322.4955911502.

The spelling of 33540640 in words is "thirty-three million, five hundred forty thousand, six hundred forty".