399144022 has 8 divisors (see below), whose sum is σ = 611454816. Its totient is φ = 195325752.

The previous prime is 399144019. The next prime is 399144029. The reversal of 399144022 is 220441993.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399144029) 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, 2123013 + ... + 2123200.

It is an arithmetic number, because the mean of its divisors is an integer number (76431852).

Almost surely, 2^399144022 is an apocalyptic number.

399144022 is a deficient number, since it is larger than the sum of its proper divisors (212310794).

399144022 is a wasteful number, since it uses less digits than its factorization.

399144022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4246262.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 399144022 is about 19978.5890893226. The cubic root of 399144022 is about 736.2803493955.

The spelling of 399144022 in words is "three hundred ninety-nine million, one hundred forty-four thousand, twenty-two".