1968852690 has 128 divisors (see below), whose sum is σ = 6027840000. Its totient is φ = 447959808.

The previous prime is 1968852689. The next prime is 1968852719. The reversal of 1968852690 is 962588691.

It is a happy number.

It is a super-2 number, since 2×1968852690² = 7752761829840472200, 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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 430536 + ... + 435084.

It is an arithmetic number, because the mean of its divisors is an integer number (47092500).

Almost surely, 2^1968852690 is an apocalyptic number.

1968852690 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 1968852690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3013920000).

1968852690 is an abundant number, since it is smaller than the sum of its proper divisors (4058987310).

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

1968852690 is a wasteful number, since it uses less digits than its factorization.

1968852690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4801 (or 4795 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 54.

The square root of 1968852690 is about 44371.7555433634. The cubic root of 1968852690 is about 1253.3462744973.

The spelling of 1968852690 in words is "one billion, nine hundred sixty-eight million, eight hundred fifty-two thousand, six hundred ninety".