1791820672 has 32 divisors (see below), whose sum is σ = 3779626320. Its totient is φ = 843208704.

The previous prime is 1791820637. The next prime is 1791820691. The reversal of 1791820672 is 2760281971.

It is a tau number, because it is divible by the number of its divisors (32).

It is a plaindrome in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 409548 + ... + 413899.

Almost surely, 2^1791820672 is an apocalyptic number.

It is an amenable number.

1791820672 is an abundant number, since it is smaller than the sum of its proper divisors (1987805648).

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

1791820672 is an equidigital number, since it uses as much as digits as its factorization.

1791820672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823478 (or 823466 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 43.

The square root of 1791820672 is about 42329.9028111334. The cubic root of 1791820672 is about 1214.5950706258.

The spelling of 1791820672 in words is "one billion, seven hundred ninety-one million, eight hundred twenty thousand, six hundred seventy-two".