1720138688 has 14 divisors (see below), whose sum is σ = 3413400336. Its totient is φ = 860069312.

The previous prime is 1720138669. The next prime is 1720138703. The reversal of 1720138688 is 8868310271.

It is a super-2 number, since 2×1720138688² = 5917754211908722688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13438520 + ... + 13438647.

Almost surely, 2^1720138688 is an apocalyptic number.

It is an amenable number.

1720138688 is a deficient number, since it is larger than the sum of its proper divisors (1693261648).

1720138688 is an equidigital number, since it uses as much as digits as its factorization.

1720138688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26877179 (or 26877169 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 1720138688 is about 41474.5547052648. The cubic root of 1720138688 is about 1198.1774852866.

The spelling of 1720138688 in words is "one billion, seven hundred twenty million, one hundred thirty-eight thousand, six hundred eighty-eight".