3891500 has 48 divisors (see below), whose sum is σ = 8744736. Its totient is φ = 1512000.

The previous prime is 3891493. The next prime is 3891527. The reversal of 3891500 is 51983.

3891500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 3891500.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 21410 + ... + 21590.

It is an arithmetic number, because the mean of its divisors is an integer number (182182).

Almost surely, 2^3891500 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 3891500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4372368).

3891500 is an abundant number, since it is smaller than the sum of its proper divisors (4853236).

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

3891500 is a wasteful number, since it uses less digits than its factorization.

3891500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243 (or 231 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 3891500 is about 1972.6885207756. The cubic root of 3891500 is about 157.2916536312.

The spelling of 3891500 in words is "three million, eight hundred ninety-one thousand, five hundred".