40039634236 has 12 divisors (see below), whose sum is σ = 80079268528. Its totient is φ = 17159843232.

The previous prime is 40039634233. The next prime is 40039634237. The reversal of 40039634236 is 63243693004.

40039634236 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40039634233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 714993441 + ... + 714993496.

Almost surely, 2^40039634236 is an apocalyptic number.

It is an amenable number.

40039634236 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

40039634236 is a wasteful number, since it uses less digits than its factorization.

40039634236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1429986948 (or 1429986946 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 40.

The spelling of 40039634236 in words is "forty billion, thirty-nine million, six hundred thirty-four thousand, two hundred thirty-six".