1606999040 has 176 divisors, whose sum is σ = 4067798400. Its totient is φ = 608305152.

The previous prime is 1606999003. The next prime is 1606999129. The reversal of 1606999040 is 409996061.

It is a junction number, because it is equal to n+sod(n) for n = 1606998982 and 1606999000.

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, 11729852 + ... + 11729988.

Almost surely, 2^1606999040 is an apocalyptic number.

1606999040 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 1606999040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2033899200).

1606999040 is an abundant number, since it is smaller than the sum of its proper divisors (2460799360).

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

1606999040 is a wasteful number, since it uses less digits than its factorization.

1606999040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270 (or 252 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 1606999040 is about 40087.3925318173. The cubic root of 1606999040 is about 1171.3100576401.

The spelling of 1606999040 in words is "one billion, six hundred six million, nine hundred ninety-nine thousand, forty".