39996747 has 40 divisors (see below), whose sum is σ = 71275776. Its totient is φ = 21854448.

The previous prime is 39996743. The next prime is 39996757. The reversal of 39996747 is 74769993.

It is not a de Polignac number, because 39996747 - 2² = 39996743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 39996693 and 39996702.

It is not an unprimeable number, because it can be changed into a prime (39996743) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 11508 + ... + 14574.

Almost surely, 2^39996747 is an apocalyptic number.

39996747 is a deficient number, since it is larger than the sum of its proper divisors (31279029).

39996747 is a wasteful number, since it uses less digits than its factorization.

39996747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3109 (or 3100 counting only the distinct ones).

The product of its digits is 2571912, while the sum is 54.

The square root of 39996747 is about 6324.2981428772. The cubic root of 39996747 is about 341.9859181644.

The spelling of 39996747 in words is "thirty-nine million, nine hundred ninety-six thousand, seven hundred forty-seven".