1601880786 has 96 divisors (see below), whose sum is σ = 3963960000. Its totient is φ = 480790080.

The previous prime is 1601880779. The next prime is 1601880799. The reversal of 1601880786 is 6870881061.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 581340 + ... + 584088.

It is an arithmetic number, because the mean of its divisors is an integer number (41291250).

Almost surely, 2^1601880786 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1601880786, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1981980000).

1601880786 is an abundant number, since it is smaller than the sum of its proper divisors (2362079214).

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

1601880786 is a wasteful number, since it uses less digits than its factorization.

1601880786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2886 (or 2874 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 45.

The square root of 1601880786 is about 40023.5029201593. The cubic root of 1601880786 is about 1170.0652034668.

The spelling of 1601880786 in words is "one billion, six hundred one million, eight hundred eighty thousand, seven hundred eighty-six".