3420399 has 16 divisors (see below), whose sum is σ = 5011200. Its totient is φ = 2065536.

The previous prime is 3420371. The next prime is 3420401. The reversal of 3420399 is 9930243.

It is not a de Polignac number, because 3420399 - 2⁵ = 3420367 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3420299) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7 + ... + 2615.

It is an arithmetic number, because the mean of its divisors is an integer number (313200).

Almost surely, 2^3420399 is an apocalyptic number.

3420399 is a deficient number, since it is larger than the sum of its proper divisors (1590801).

3420399 is a wasteful number, since it uses less digits than its factorization.

3420399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2654.

The product of its (nonzero) digits is 5832, while the sum is 30.

The square root of 3420399 is about 1849.4320749895. The cubic root of 3420399 is about 150.6695843754.

The spelling of 3420399 in words is "three million, four hundred twenty thousand, three hundred ninety-nine".