3992872 has 16 divisors (see below), whose sum is σ = 8062740. Its totient is φ = 1842816.

The previous prime is 3992843. The next prime is 3992873. The reversal of 3992872 is 2782993.

It can be written as a sum of positive squares in 2 ways, for example, as 3663396 + 329476 = 1914^2 + 574^2 .

It is not an unprimeable number, because it can be changed into a prime (3992873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19093 + ... + 19300.

Almost surely, 2^3992872 is an apocalyptic number.

It is an amenable number.

3992872 is an abundant number, since it is smaller than the sum of its proper divisors (4069868).

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

3992872 is a wasteful number, since it uses less digits than its factorization.

3992872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38412 (or 38408 counting only the distinct ones).

The product of its digits is 54432, while the sum is 40.

The square root of 3992872 is about 1998.2172054109. The cubic root of 3992872 is about 158.6457575096.

It can be divided in two parts, 39928 and 72, that added together give a square (40000 = 200²).

The spelling of 3992872 in words is "three million, nine hundred ninety-two thousand, eight hundred seventy-two".