3891800 has 96 divisors (see below), whose sum is σ = 10378800. Its totient is φ = 1344000.

The previous prime is 3891781. The next prime is 3891803. The reversal of 3891800 is 81983.

It is a happy number.

3891800 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×3891800² = 30292214480000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3891803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63770 + ... + 63830.

Almost surely, 2^3891800 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3891800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5189400).

3891800 is an abundant number, since it is smaller than the sum of its proper divisors (6487000).

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

3891800 is a wasteful number, since it uses less digits than its factorization.

3891800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 3891800 is about 1972.7645576703. The cubic root of 3891800 is about 157.2956954560.

The spelling of 3891800 in words is "three million, eight hundred ninety-one thousand, eight hundred".