1606794640 has 160 divisors (see below), whose sum is σ = 4246442496. Its totient is φ = 560302080.

The previous prime is 1606794617. The next prime is 1606794649. The reversal of 1606794640 is 464976061.

It is not an unprimeable number, because it can be changed into a prime (1606794649) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2191714 + ... + 2192446.

Almost surely, 2^1606794640 is an apocalyptic number.

1606794640 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 1606794640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2123221248).

1606794640 is an abundant number, since it is smaller than the sum of its proper divisors (2639647856).

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

1606794640 is a wasteful number, since it uses less digits than its factorization.

1606794640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857 (or 851 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 1606794640 is about 40084.8430207728. The cubic root of 1606794640 is about 1171.2603944851.

The spelling of 1606794640 in words is "one billion, six hundred six million, seven hundred ninety-four thousand, six hundred forty".