39928371 has 16 divisors (see below), whose sum is σ = 60958464. Its totient is φ = 22773024.

The previous prime is 39928351. The next prime is 39928379. The reversal of 39928371 is 17382993.

It is not a de Polignac number, because 39928371 - 2⁶ = 39928307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39928379) 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, 12025 + ... + 14981.

It is an arithmetic number, because the mean of its divisors is an integer number (3809904).

Almost surely, 2^39928371 is an apocalyptic number.

39928371 is a deficient number, since it is larger than the sum of its proper divisors (21030093).

39928371 is a wasteful number, since it uses less digits than its factorization.

39928371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3610.

The product of its digits is 81648, while the sum is 42.

The square root of 39928371 is about 6318.8900132856. The cubic root of 39928371 is about 341.7909275828.

The spelling of 39928371 in words is "thirty-nine million, nine hundred twenty-eight thousand, three hundred seventy-one".