3992278 has 8 divisors (see below), whose sum is σ = 6101568. Its totient is φ = 1958424.

The previous prime is 3992257. The next prime is 3992279. The reversal of 3992278 is 8722993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 3992278.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3992279) 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, 18726 + ... + 18937.

It is an arithmetic number, because the mean of its divisors is an integer number (762696).

Almost surely, 2^3992278 is an apocalyptic number.

3992278 is a deficient number, since it is larger than the sum of its proper divisors (2109290).

3992278 is a wasteful number, since it uses less digits than its factorization.

3992278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37718.

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

The square root of 3992278 is about 1998.0685673920. The cubic root of 3992278 is about 158.6378901355.

It can be divided in two parts, 39922 and 78, that added together give a square (40000 = 200²).

The spelling of 3992278 in words is "three million, nine hundred ninety-two thousand, two hundred seventy-eight".