3920478172 has 24 divisors (see below), whose sum is σ = 7392825216. Its totient is φ = 1808415168.

The previous prime is 3920478169. The next prime is 3920478193. The reversal of 3920478172 is 2718740293.

It is a super-3 number, since 3×3920478172³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74118 + ... + 115474.

It is an arithmetic number, because the mean of its divisors is an integer number (308034384).

Almost surely, 2^3920478172 is an apocalyptic number.

It is an amenable number.

3920478172 is a deficient number, since it is larger than the sum of its proper divisors (3472347044).

3920478172 is a wasteful number, since it uses less digits than its factorization.

3920478172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43197 (or 43195 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 3920478172 is about 62613.7219146091. The cubic root of 3920478172 is about 1576.8111419431.

The spelling of 3920478172 in words is "three billion, nine hundred twenty million, four hundred seventy-eight thousand, one hundred seventy-two".