1606746820 has 48 divisors (see below), whose sum is σ = 3867954048. Its totient is φ = 549204480.

The previous prime is 1606746803. The next prime is 1606746829. The reversal of 1606746820 is 286476061.

It is a super-2 number, since 2×1606746820² = 5163270687160224800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1606746829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29004 + ... + 63676.

It is an arithmetic number, because the mean of its divisors is an integer number (80582376).

Almost surely, 2^1606746820 is an apocalyptic number.

1606746820 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 1606746820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1933977024).

1606746820 is an abundant number, since it is smaller than the sum of its proper divisors (2261207228).

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

1606746820 is a wasteful number, since it uses less digits than its factorization.

1606746820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35020 (or 35018 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 1606746820 is about 40084.2465315241. The cubic root of 1606746820 is about 1171.2487750314.

The spelling of 1606746820 in words is "one billion, six hundred six million, seven hundred forty-six thousand, eight hundred twenty".