3851988 has 36 divisors (see below), whose sum is σ = 10456992. Its totient is φ = 1100400.

The previous prime is 3851977. The next prime is 3851989. The reversal of 3851988 is 8891583.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3851989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2688 + ... + 3863.

It is an arithmetic number, because the mean of its divisors is an integer number (290472).

Almost surely, 2^3851988 is an apocalyptic number.

It is an amenable number.

3851988 is an abundant number, since it is smaller than the sum of its proper divisors (6605004).

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

3851988 is a wasteful number, since it uses less digits than its factorization.

3851988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6572 (or 6563 counting only the distinct ones).

The product of its digits is 69120, while the sum is 42.

The square root of 3851988 is about 1962.6482109640. The cubic root of 3851988 is about 156.7574927293.

The spelling of 3851988 in words is "three million, eight hundred fifty-one thousand, nine hundred eighty-eight".