3993478804722 has 32 divisors (see below), whose sum is σ = 8713488476160. Its totient is φ = 1210083451920.

The previous prime is 3993478804673. The next prime is 3993478804741. The reversal of 3993478804722 is 2274088743993.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (66).

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 15 ways as a sum of consecutive naturals, for example, 227038 + ... + 2835225.

It is an arithmetic number, because the mean of its divisors is an integer number (272296514880).

Almost surely, 2^{3993478804722} is an apocalyptic number.

3993478804722 is an abundant number, since it is smaller than the sum of its proper divisors (4720009671438).

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

3993478804722 is a wasteful number, since it uses less digits than its factorization.

3993478804722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3082038.

The product of its (nonzero) digits is 146313216, while the sum is 66.

The spelling of 3993478804722 in words is "three trillion, nine hundred ninety-three billion, four hundred seventy-eight million, eight hundred four thousand, seven hundred twenty-two".