39840316397 has 16 divisors (see below), whose sum is σ = 45828076032. Its totient is φ = 33926785200.

The previous prime is 39840316393. The next prime is 39840316457. The reversal of 39840316397 is 79361304893.

It is not a de Polignac number, because 39840316397 - 2² = 39840316393 is a prime.

It is a super-2 number, since 2×39840316397² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39840316393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4389458 + ... + 4398524.

It is an arithmetic number, because the mean of its divisors is an integer number (2864254752).

Almost surely, 2^39840316397 is an apocalyptic number.

It is an amenable number.

39840316397 is a deficient number, since it is larger than the sum of its proper divisors (5987759635).

39840316397 is a wasteful number, since it uses less digits than its factorization.

39840316397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13088.

The product of its (nonzero) digits is 2939328, while the sum is 53.

The spelling of 39840316397 in words is "thirty-nine billion, eight hundred forty million, three hundred sixteen thousand, three hundred ninety-seven".