399246220373 has 32 divisors (see below), whose sum is σ = 564264099840. Its totient is φ = 272055879360.

The previous prime is 399246220343. The next prime is 399246220459. The reversal of 399246220373 is 373022642993.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 399246220373 - 2¹⁶ = 399246154837 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399246220313) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10476965 + ... + 10515002.

It is an arithmetic number, because the mean of its divisors is an integer number (17633253120).

Almost surely, 2^399246220373 is an apocalyptic number.

It is an amenable number.

399246220373 is a deficient number, since it is larger than the sum of its proper divisors (165017879467).

399246220373 is a wasteful number, since it uses less digits than its factorization.

399246220373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20992017.

The product of its (nonzero) digits is 2939328, while the sum is 50.

The spelling of 399246220373 in words is "three hundred ninety-nine billion, two hundred forty-six million, two hundred twenty thousand, three hundred seventy-three".