3945839092 has 54 divisors (see below), whose sum is σ = 7711453302. Its totient is φ = 1756137600.

The previous prime is 3945839089. The next prime is 3945839099. The reversal of 3945839092 is 2909385493.

It can be written as a sum of positive squares in 3 ways, for example, as 534811876 + 3411027216 = 23126^2 + 58404^2 .

It is a super-2 number, since 2×3945839092² = 31139292279910768928, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3945839099) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 14041992 + ... + 14042272.

Almost surely, 2^3945839092 is an apocalyptic number.

It is an amenable number.

3945839092 is a deficient number, since it is larger than the sum of its proper divisors (3765614210).

3945839092 is a wasteful number, since it uses less digits than its factorization.

3945839092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641 (or 327 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 52.

The square root of 3945839092 is about 62815.9143211336. The cubic root of 3945839092 is about 1580.2038795819.

Multiplying 3945839092 by its sum of digits (52), we get a square (205183632784 = 452972²).

3945839092 divided by its sum of digits (52) gives a square (75881521 = 8711²).

The spelling of 3945839092 in words is "three billion, nine hundred forty-five million, eight hundred thirty-nine thousand, ninety-two".