3891228876 has 48 divisors (see below), whose sum is σ = 10361040480. Its totient is φ = 1262018880.

The previous prime is 3891228871. The next prime is 3891228893. The reversal of 3891228876 is 6788221983.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (3891228871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 482895 + ... + 490886.

It is an arithmetic number, because the mean of its divisors is an integer number (215855010).

Almost surely, 2^3891228876 is an apocalyptic number.

3891228876 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

3891228876 is an abundant number, since it is smaller than the sum of its proper divisors (6469811604).

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

3891228876 is a wasteful number, since it uses less digits than its factorization.

3891228876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973831 (or 973823 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 3891228876 is about 62379.7152606518. The cubic root of 3891228876 is about 1572.8800066679.

The spelling of 3891228876 in words is "three billion, eight hundred ninety-one million, two hundred twenty-eight thousand, eight hundred seventy-six".