399229367716 has 27 divisors (see below), whose sum is σ = 701232815073. Its totient is φ = 198879846960.

The previous prime is 399229367699. The next prime is 399229367759. The reversal of 399229367716 is 617763922993.

It is a happy number.

The square root of 399229367716 is 631846.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 390562502500 + 8666865216 = 624950^2 + 93096^2 .

It is a super-3 number, since 3×399229367716³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 544650886 + ... + 544651618.

Almost surely, 2^399229367716 is an apocalyptic number.

399229367716 is the 631846-th square number.

It is an amenable number.

399229367716 is a deficient number, since it is larger than the sum of its proper divisors (302003447357).

399229367716 is an frugal number, since it uses more digits than its factorization.

399229367716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2332 (or 1166 counting only the distinct ones).

The product of its digits is 46294416, while the sum is 64.

Multiplying 399229367716 by its sum of digits (64), we get a square (25550679533824 = 5054768²).

The spelling of 399229367716 in words is "three hundred ninety-nine billion, two hundred twenty-nine million, three hundred sixty-seven thousand, seven hundred sixteen".