1791399680 has 72 divisors (see below), whose sum is σ = 4903981152. Its totient is φ = 614191104.

The previous prime is 1791399679. The next prime is 1791399691. The reversal of 1791399680 is 869931971.

It is a super-2 number, since 2×1791399680² = 6418225627008204800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91007 + ... + 108926.

Almost surely, 2^1791399680 is an apocalyptic number.

1791399680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1791399680 is an abundant number, since it is smaller than the sum of its proper divisors (3112581472).

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

1791399680 is an equidigital number, since it uses as much as digits as its factorization.

1791399680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199961 (or 199947 counting only the distinct ones).

The product of its (nonzero) digits is 734832, while the sum is 53.

The square root of 1791399680 is about 42324.9297695814. The cubic root of 1791399680 is about 1214.4999392942.

The spelling of 1791399680 in words is "one billion, seven hundred ninety-one million, three hundred ninety-nine thousand, six hundred eighty".