399246213822 has 16 divisors (see below), whose sum is σ = 799000716672. Its totient is φ = 132997356440.

The previous prime is 399246213787. The next prime is 399246213823. The reversal of 399246213822 is 228312642993.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399246213823) 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, 21168498 + ... + 21187349.

It is an arithmetic number, because the mean of its divisors is an integer number (49937544792).

Almost surely, 2^399246213822 is an apocalyptic number.

399246213822 is an abundant number, since it is smaller than the sum of its proper divisors (399754502850).

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

399246213822 is a wasteful number, since it uses less digits than its factorization.

399246213822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42357423.

The product of its digits is 2239488, while the sum is 51.

The spelling of 399246213822 in words is "three hundred ninety-nine billion, two hundred forty-six million, two hundred thirteen thousand, eight hundred twenty-two".