3929947020 has 36 divisors (see below), whose sum is σ = 11920839840. Its totient is φ = 1047985824.

The previous prime is 3929947019. The next prime is 3929947033. The reversal of 3929947020 is 207499293.

3929947020 is a `hidden beast` number, since 3 + 92 + 99 + 470 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10916340 + ... + 10916699.

It is an arithmetic number, because the mean of its divisors is an integer number (331134440).

Almost surely, 2^3929947020 is an apocalyptic number.

3929947020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3929947020 is an abundant number, since it is smaller than the sum of its proper divisors (7990892820).

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

3929947020 is a wasteful number, since it uses less digits than its factorization.

3929947020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21833054 (or 21833049 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 3929947020 is about 62689.2895158336. The cubic root of 3929947020 is about 1578.0795740256.

The spelling of 3929947020 in words is "three billion, nine hundred twenty-nine million, nine hundred forty-seven thousand, twenty".