3998587 has 4 divisors (see below), whose sum is σ = 4233816. Its totient is φ = 3763360.

The previous prime is 3998581. The next prime is 3998591. The reversal of 3998587 is 7858993.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3998587 - 2⁷ = 3998459 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3998587.

It is not an unprimeable number, because it can be changed into a prime (3998581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117589 + ... + 117622.

It is an arithmetic number, because the mean of its divisors is an integer number (1058454).

Almost surely, 2^3998587 is an apocalyptic number.

3998587 is a deficient number, since it is larger than the sum of its proper divisors (235229).

3998587 is a wasteful number, since it uses less digits than its factorization.

3998587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235228.

The product of its digits is 544320, while the sum is 49.

The square root of 3998587 is about 1999.6467187981. The cubic root of 3998587 is about 158.7214113481.

The spelling of 3998587 in words is "three million, nine hundred ninety-eight thousand, five hundred eighty-seven".