3928971 has 16 divisors (see below), whose sum is σ = 5483520. Its totient is φ = 2499360.

The previous prime is 3928961. The next prime is 3928973. The reversal of 3928971 is 1798293.

It is not a de Polignac number, because 3928971 - 2⁷ = 3928843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3928973) 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, 7465 + ... + 7973.

It is an arithmetic number, because the mean of its divisors is an integer number (342720).

Almost surely, 2^3928971 is an apocalyptic number.

3928971 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

3928971 is a deficient number, since it is larger than the sum of its proper divisors (1554549).

3928971 is a wasteful number, since it uses less digits than its factorization.

3928971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626.

The product of its digits is 27216, while the sum is 39.

The square root of 3928971 is about 1982.1632122507. The cubic root of 3928971 is about 157.7948922158.

The spelling of 3928971 in words is "three million, nine hundred twenty-eight thousand, nine hundred seventy-one".