399214203556 has 27 divisors (see below), whose sum is σ = 812704064907. Its totient is φ = 171088010520.

The previous prime is 399214203527. The next prime is 399214203581. The reversal of 399214203556 is 655302412993.

It is a happy number.

The square root of 399214203556 is 631834.

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

It is a Harshad number since it is a multiple of its sum of digits (49).

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 8823111 + ... + 8868241.

Almost surely, 2^399214203556 is an apocalyptic number.

399214203556 is the 631834-th square number.

It is an amenable number.

399214203556 is an abundant number, since it is smaller than the sum of its proper divisors (413489861351).

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

399214203556 is an frugal number, since it uses more digits than its factorization.

399214203556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90280 (or 45140 counting only the distinct ones).

The product of its (nonzero) digits is 1749600, while the sum is 49.

Multiplying 399214203556 by its sum of digits (49), we get a square (19561495974244 = 4422838²).

399214203556 divided by its sum of digits (49) gives a square (8147228644 = 90262²).

The spelling of 399214203556 in words is "three hundred ninety-nine billion, two hundred fourteen million, two hundred three thousand, five hundred fifty-six".