3996872 has 24 divisors (see below), whose sum is σ = 8239350. Its totient is φ = 1816320.

The previous prime is 3996869. The next prime is 3996911. The reversal of 3996872 is 2786993.

It can be written as a sum of positive squares in only one way, i.e., 3334276 + 662596 = 1826^2 + 814^2 .

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a d-powerful number, because it can be written as 3⁹ + 9³ + 9⁶ + 6² + 8⁷ + 7⁷ + 2¹⁹ .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1097 + ... + 3032.

Almost surely, 2^3996872 is an apocalyptic number.

It is an amenable number.

3996872 is an abundant number, since it is smaller than the sum of its proper divisors (4242478).

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

3996872 is a wasteful number, since it uses less digits than its factorization.

3996872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4157 (or 4142 counting only the distinct ones).

The product of its digits is 163296, while the sum is 44.

The square root of 3996872 is about 1999.2178470592. The cubic root of 3996872 is about 158.6987161521.

The spelling of 3996872 in words is "three million, nine hundred ninety-six thousand, eight hundred seventy-two".