3928431 has 16 divisors (see below), whose sum is σ = 5677056. Its totient is φ = 2402016.

The previous prime is 3928429. The next prime is 3928447. The reversal of 3928431 is 1348293.

It is not a de Polignac number, because 3928431 - 2¹ = 3928429 is a prime.

It is a super-2 number, since 2×3928431² = 30865140243522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3928451) 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, 10066 + ... + 10448.

It is an arithmetic number, because the mean of its divisors is an integer number (354816).

Almost surely, 2^3928431 is an apocalyptic number.

3928431 is a deficient number, since it is larger than the sum of its proper divisors (1748625).

3928431 is a wasteful number, since it uses less digits than its factorization.

3928431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662.

The product of its digits is 5184, while the sum is 30.

The square root of 3928431 is about 1982.0269927526. The cubic root of 3928431 is about 157.7876627448.

It can be divided in two parts, 39 and 28431, that multiplied together give a square (1108809 = 1053²).

The spelling of 3928431 in words is "three million, nine hundred twenty-eight thousand, four hundred thirty-one".