33900640 has 24 divisors (see below), whose sum is σ = 80090640. Its totient is φ = 13560192.

The previous prime is 33900637. The next prime is 33900653. The reversal of 33900640 is 4600933.

It is a super-2 number, since 2×33900640² = 2298506784819200, 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 (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105780 + ... + 106099.

It is an arithmetic number, because the mean of its divisors is an integer number (3337110).

Almost surely, 2^33900640 is an apocalyptic number.

It is an amenable number.

33900640 is an abundant number, since it is smaller than the sum of its proper divisors (46190000).

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

33900640 is a wasteful number, since it uses less digits than its factorization.

33900640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211894 (or 211886 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 33900640 is about 5822.4256113754. The cubic root of 33900640 is about 323.6452959167.

The spelling of 33900640 in words is "thirty-three million, nine hundred thousand, six hundred forty".