3891814020 has 96 divisors (see below), whose sum is σ = 12136185600. Its totient is φ = 1035389952.

The previous prime is 3891814001. The next prime is 3891814027. The reversal of 3891814020 is 204181983.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (3891814027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 228852 + ... + 245268.

It is an arithmetic number, because the mean of its divisors is an integer number (126418600).

Almost surely, 2^3891814020 is an apocalyptic number.

3891814020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3891814020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6068092800).

3891814020 is an abundant number, since it is smaller than the sum of its proper divisors (8244371580).

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

3891814020 is a wasteful number, since it uses less digits than its factorization.

3891814020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16874 (or 16866 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 3891814020 is about 62384.4052628540. The cubic root of 3891814020 is about 1572.9588433883.

It can be divided in two parts, 389 and 1814020, that added together give a square (1814409 = 1347²).

The spelling of 3891814020 in words is "three billion, eight hundred ninety-one million, eight hundred fourteen thousand, twenty".