3891357860 has 24 divisors (see below), whose sum is σ = 8800456056. Its totient is φ = 1436808960.

The previous prime is 3891357853. The next prime is 3891357889. The reversal of 3891357860 is 687531983.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 254785444 + 3636572416 = 15962^2 + 60304^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3891357799 and 3891357808.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7483121 + ... + 7483640.

It is an arithmetic number, because the mean of its divisors is an integer number (366685669).

Almost surely, 2^3891357860 is an apocalyptic number.

It is an amenable number.

3891357860 is an abundant number, since it is smaller than the sum of its proper divisors (4909098196).

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

3891357860 is a wasteful number, since it uses less digits than its factorization.

3891357860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14966783 (or 14966781 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 50.

The square root of 3891357860 is about 62380.7491138091. The cubic root of 3891357860 is about 1572.8973854206.

The spelling of 3891357860 in words is "three billion, eight hundred ninety-one million, three hundred fifty-seven thousand, eight hundred sixty".