1606993720 has 32 divisors (see below), whose sum is σ = 3624613200. Its totient is φ = 641219328.

The previous prime is 1606993669. The next prime is 1606993763. The reversal of 1606993720 is 273996061.

It is a super-2 number, since 2×1606993720² = 5164857632238876800, 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 (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32754 + ... + 65473.

Almost surely, 2^1606993720 is an apocalyptic number.

1606993720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1606993720 is an abundant number, since it is smaller than the sum of its proper divisors (2017619480).

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

1606993720 is a wasteful number, since it uses less digits than its factorization.

1606993720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98647 (or 98643 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 1606993720 is about 40087.3261767357. The cubic root of 1606993720 is about 1171.3087650908.

The spelling of 1606993720 in words is "one billion, six hundred six million, nine hundred ninety-three thousand, seven hundred twenty".