33686940 has 48 divisors (see below), whose sum is σ = 107799552. Its totient is φ = 7699776.

The previous prime is 33686929. The next prime is 33686957. The reversal of 33686940 is 4968633.

It is a super-2 number, since 2×33686940² = 2269619853127200, 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, 39684 + ... + 40523.

It is an arithmetic number, because the mean of its divisors is an integer number (2245824).

Almost surely, 2^33686940 is an apocalyptic number.

33686940 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

33686940 is an abundant number, since it is smaller than the sum of its proper divisors (74112612).

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

33686940 is a wasteful number, since it uses less digits than its factorization.

33686940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80226 (or 80224 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 39.

The square root of 33686940 is about 5804.0451411063. The cubic root of 33686940 is about 322.9638059429.

The spelling of 33686940 in words is "thirty-three million, six hundred eighty-six thousand, nine hundred forty".