399476883456 has 448 divisors, whose sum is σ = 1369560915600. Its totient is φ = 114088476672.

The previous prime is 399476883437. The next prime is 399476883541. The reversal of 399476883456 is 654388674993.

399476883456 is a `hidden beast` number, since 3 + 9 + 94 + 7 + 6 + 8 + 83 + 456 = 666.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 167213910 + ... + 167216298.

Almost surely, 2^399476883456 is an apocalyptic number.

399476883456 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399476883456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (684780457800).

399476883456 is an abundant number, since it is smaller than the sum of its proper divisors (970084032144).

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

399476883456 is an frugal number, since it uses more digits than its factorization.

399476883456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2444 (or 2401 counting only the distinct ones).

The product of its digits is 940584960, while the sum is 72.

The spelling of 399476883456 in words is "three hundred ninety-nine billion, four hundred seventy-six million, eight hundred eighty-three thousand, four hundred fifty-six".