3999772 has 18 divisors (see below), whose sum is σ = 8142792. Its totient is φ = 1714104.

The previous prime is 3999763. The next prime is 3999773. The reversal of 3999772 is 2779993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3999773) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10008 + ... + 10399.

Almost surely, 2^3999772 is an apocalyptic number.

It is an amenable number.

3999772 is an abundant number, since it is smaller than the sum of its proper divisors (4143020).

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

3999772 is a wasteful number, since it uses less digits than its factorization.

3999772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20425 (or 20416 counting only the distinct ones).

The product of its digits is 214326, while the sum is 46.

The square root of 3999772 is about 1999.9429991877. The cubic root of 3999772 is about 158.7370890775.

It can be divided in two parts, 399 and 9772, that multiplied together give a triangular number (3899028 = T₂₇₉₂).

The spelling of 3999772 in words is "three million, nine hundred ninety-nine thousand, seven hundred seventy-two".