1928994216 has 128 divisors (see below), whose sum is σ = 5230915200. Its totient is φ = 590561280.

The previous prime is 1928994211. The next prime is 1928994293. The reversal of 1928994216 is 6124998291.

It is a super-2 number, since 2×1928994216² = 7442037370722909312, which contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (1928994211) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 4454736 + ... + 4455168.

It is an arithmetic number, because the mean of its divisors is an integer number (40866525).

Almost surely, 2^1928994216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1928994216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2615457600).

1928994216 is an abundant number, since it is smaller than the sum of its proper divisors (3301920984).

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

1928994216 is a wasteful number, since it uses less digits than its factorization.

1928994216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699 (or 695 counting only the distinct ones).

The product of its digits is 559872, while the sum is 51.

The square root of 1928994216 is about 43920.3166655251. The cubic root of 1928994216 is about 1244.8307519806.

The spelling of 1928994216 in words is "one billion, nine hundred twenty-eight million, nine hundred ninety-four thousand, two hundred sixteen".