1606694720 has 112 divisors (see below), whose sum is σ = 4043476800. Its totient is φ = 606412800.

The previous prime is 1606694689. The next prime is 1606694759. The reversal of 1606694720 is 274966061.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2437751 + ... + 2438409.

Almost surely, 2^1606694720 is an apocalyptic number.

1606694720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1606694720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2021738400).

1606694720 is an abundant number, since it is smaller than the sum of its proper divisors (2436782080).

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

1606694720 is a wasteful number, since it uses less digits than its factorization.

1606694720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1096 (or 1086 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 1606694720 is about 40083.5966450118. The cubic root of 1606694720 is about 1171.2361153475.

The spelling of 1606694720 in words is "one billion, six hundred six million, six hundred ninety-four thousand, seven hundred twenty".