3928691980 has 12 divisors (see below), whose sum is σ = 8250253200. Its totient is φ = 1571476784.

The previous prime is 3928691911. The next prime is 3928691989. The reversal of 3928691980 is 891968293.

It is not an unprimeable number, because it can be changed into a prime (3928691989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98217280 + ... + 98217319.

It is an arithmetic number, because the mean of its divisors is an integer number (687521100).

Almost surely, 2^3928691980 is an apocalyptic number.

It is an amenable number.

3928691980 is an abundant number, since it is smaller than the sum of its proper divisors (4321561220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3928691980 is a wasteful number, since it uses less digits than its factorization.

3928691980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196434608 (or 196434606 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 55.

The square root of 3928691980 is about 62679.2787131441. The cubic root of 3928691980 is about 1577.9115680408.

The spelling of 3928691980 in words is "three billion, nine hundred twenty-eight million, six hundred ninety-one thousand, nine hundred eighty".