3988845 has 72 divisors (see below), whose sum is σ = 8465184. Its totient is φ = 1796256.

The previous prime is 3988823. The next prime is 3988877. The reversal of 3988845 is 5488893.

3988845 = 69³ + 70³ + ... + 78³.

It is not a de Polignac number, because 3988845 - 2⁶ = 3988781 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 3988845.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 59502 + ... + 59568.

It is an arithmetic number, because the mean of its divisors is an integer number (117572).

Almost surely, 2^3988845 is an apocalyptic number.

3988845 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3988845 is an abundant number, since it is smaller than the sum of its proper divisors (4476339).

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

3988845 is an equidigital number, since it uses as much as digits as its factorization.

3988845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101 (or 82 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 3988845 is about 1997.2093030026. The cubic root of 3988845 is about 158.5924056565.

The spelling of 3988845 in words is "three million, nine hundred eighty-eight thousand, eight hundred forty-five".