3991226 has 8 divisors (see below), whose sum is σ = 6339060. Its totient is φ = 1878208.

The previous prime is 3991223. The next prime is 3991237. The reversal of 3991226 is 6221993.

It can be written as a sum of positive squares in 2 ways, for example, as 3900625 + 90601 = 1975^2 + 301^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 3991192 and 3991201.

It is not an unprimeable number, because it can be changed into a prime (3991223) 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, 58661 + ... + 58728.

Almost surely, 2^3991226 is an apocalyptic number.

3991226 is a deficient number, since it is larger than the sum of its proper divisors (2347834).

3991226 is a wasteful number, since it uses less digits than its factorization.

3991226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117408.

The product of its digits is 5832, while the sum is 32.

The square root of 3991226 is about 1997.8052958184. The cubic root of 3991226 is about 158.6239547565.

The spelling of 3991226 in words is "three million, nine hundred ninety-one thousand, two hundred twenty-six".