3998787 has 8 divisors (see below), whose sum is σ = 5741904. Its totient is φ = 2460768.

The previous prime is 3998779. The next prime is 3998789. The reversal of 3998787 is 7878993.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3998787 - 2³ = 3998779 is a prime.

3998787 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3998789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51228 + ... + 51305.

It is an arithmetic number, because the mean of its divisors is an integer number (717738).

Almost surely, 2^3998787 is an apocalyptic number.

3998787 is a deficient number, since it is larger than the sum of its proper divisors (1743117).

3998787 is a wasteful number, since it uses less digits than its factorization.

3998787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102549.

The product of its digits is 762048, while the sum is 51.

The square root of 3998787 is about 1999.6967270064. The cubic root of 3998787 is about 158.7240575956.

It can be divided in two parts, 3 and 998787, that multiplied together give a square (2996361 = 1731²).

The spelling of 3998787 in words is "three million, nine hundred ninety-eight thousand, seven hundred eighty-seven".