3999426 has 16 divisors (see below), whose sum is σ = 8035200. Its totient is φ = 1327088.

The previous prime is 3999421. The next prime is 3999439. The reversal of 3999426 is 6249993.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3999421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40 + ... + 2828.

It is an arithmetic number, because the mean of its divisors is an integer number (502200).

Almost surely, 2^3999426 is an apocalyptic number.

3999426 is an abundant number, since it is smaller than the sum of its proper divisors (4035774).

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

3999426 is a wasteful number, since it uses less digits than its factorization.

3999426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3033.

The product of its digits is 104976, while the sum is 42.

The square root of 3999426 is about 1999.8564948516. The cubic root of 3999426 is about 158.7325117652.

The spelling of 3999426 in words is "three million, nine hundred ninety-nine thousand, four hundred twenty-six".