3984591 has 16 divisors (see below), whose sum is σ = 5806080. Its totient is φ = 2415840.

The previous prime is 3984587. The next prime is 3984599. The reversal of 3984591 is 1954893.

3984591 is nontrivially palindromic in base 2 and base 4.

It is not a de Polignac number, because 3984591 - 2² = 3984587 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a plaindrome in base 16.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3984599) 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, 2050 + ... + 3488.

It is an arithmetic number, because the mean of its divisors is an integer number (362880).

Almost surely, 2^3984591 is an apocalyptic number.

3984591 is a deficient number, since it is larger than the sum of its proper divisors (1821489).

3984591 is a wasteful number, since it uses less digits than its factorization.

3984591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1526.

The product of its digits is 38880, while the sum is 39.

The square root of 3984591 is about 1996.1440328794. The cubic root of 3984591 is about 158.5360073700.

The spelling of 3984591 in words is "three million, nine hundred eighty-four thousand, five hundred ninety-one".