4007988 has 96 divisors (see below), whose sum is σ = 11491200. Its totient is φ = 1202688.

The previous prime is 4007981. The next prime is 4007999. The reversal of 4007988 is 8897004.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4007981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 67903 + ... + 67961.

It is an arithmetic number, because the mean of its divisors is an integer number (119700).

Almost surely, 2^4007988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4007988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5745600).

4007988 is an abundant number, since it is smaller than the sum of its proper divisors (7483212).

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

4007988 is a wasteful number, since it uses less digits than its factorization.

4007988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 4007988 is about 2001.9960039920. The cubic root of 4007988 is about 158.8457029318.

The spelling of 4007988 in words is "four million, seven thousand, nine hundred eighty-eight".