3991152 has 40 divisors (see below), whose sum is σ = 11249280. Its totient is φ = 1209280.

The previous prime is 3991139. The next prime is 3991181. The reversal of 3991152 is 2511993.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3252 + ... + 4307.

It is an arithmetic number, because the mean of its divisors is an integer number (281232).

Almost surely, 2^3991152 is an apocalyptic number.

It is an amenable number.

3991152 is an abundant number, since it is smaller than the sum of its proper divisors (7258128).

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

3991152 is a wasteful number, since it uses less digits than its factorization.

3991152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7581 (or 7575 counting only the distinct ones).

The product of its digits is 2430, while the sum is 30.

The square root of 3991152 is about 1997.7867754092. The cubic root of 3991152 is about 158.6229744190.

It can be divided in two parts, 399 and 1152, that added together give a palindrome (1551).

The spelling of 3991152 in words is "three million, nine hundred ninety-one thousand, one hundred fifty-two".