40809684 has 24 divisors (see below), whose sum is σ = 95497920. Its totient is φ = 13563904.

The previous prime is 40809649. The next prime is 40809737. The reversal of 40809684 is 48690804.

It is a congruent number.

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, 429 + ... + 9044.

It is an arithmetic number, because the mean of its divisors is an integer number (3979080).

Almost surely, 2^40809684 is an apocalyptic number.

It is an amenable number.

40809684 is an abundant number, since it is smaller than the sum of its proper divisors (54688236).

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

40809684 is a wasteful number, since it uses less digits than its factorization.

40809684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9839 (or 9837 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 40809684 is about 6388.2457685972. The cubic root of 40809684 is about 344.2873590416.

The spelling of 40809684 in words is "forty million, eight hundred nine thousand, six hundred eighty-four".