1995690690 has 256 divisors, whose sum is σ = 6494515200. Its totient is φ = 425696256.

The previous prime is 1995690659. The next prime is 1995690713. The reversal of 1995690690 is 960965991.

1995690690 is a `hidden beast` number, since 19 + 9 + 569 + 0 + 69 + 0 = 666.

It is a super-2 number, since 2×1995690690² = 7965562660305352200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 5751097 + ... + 5751443.

It is an arithmetic number, because the mean of its divisors is an integer number (25369200).

Almost surely, 2^1995690690 is an apocalyptic number.

1995690690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1995690690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3247257600).

1995690690 is an abundant number, since it is smaller than the sum of its proper divisors (4498824510).

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

1995690690 is a wasteful number, since it uses less digits than its factorization.

1995690690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566 (or 560 counting only the distinct ones).

The product of its (nonzero) digits is 1180980, while the sum is 54.

The square root of 1995690690 is about 44673.1540189407. The cubic root of 1995690690 is about 1259.0155008046.

The spelling of 1995690690 in words is "one billion, nine hundred ninety-five million, six hundred ninety thousand, six hundred ninety".