39928117 has 4 divisors (see below), whose sum is σ = 40294540. Its totient is φ = 39561696.

The previous prime is 39928111. The next prime is 39928129. The reversal of 39928117 is 71182993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71182993 = 7 ⋅10168999.

It can be written as a sum of positive squares in 2 ways, for example, as 34503876 + 5424241 = 5874^2 + 2329^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39928117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 39928117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39928111) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183048 + ... + 183265.

It is an arithmetic number, because the mean of its divisors is an integer number (10073635).

Almost surely, 2^39928117 is an apocalyptic number.

It is an amenable number.

39928117 is a deficient number, since it is larger than the sum of its proper divisors (366423).

39928117 is a wasteful number, since it uses less digits than its factorization.

39928117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366422.

The product of its digits is 27216, while the sum is 40.

The square root of 39928117 is about 6318.8699147870. The cubic root of 39928117 is about 341.7902028259.

The spelling of 39928117 in words is "thirty-nine million, nine hundred twenty-eight thousand, one hundred seventeen".