1988864068 has 48 divisors (see below), whose sum is σ = 3728927664. Its totient is φ = 924917760.

The previous prime is 1988864063. The next prime is 1988864081. The reversal of 1988864068 is 8604688891.

It can be written as a sum of positive squares in 8 ways, for example, as 16793604 + 1972070464 = 4098^2 + 44408^2 .

It is not an unprimeable number, because it can be changed into a prime (1988864063) 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, 2572530 + ... + 2573302.

It is an arithmetic number, because the mean of its divisors is an integer number (77685993).

Almost surely, 2^1988864068 is an apocalyptic number.

It is an amenable number.

1988864068 is a deficient number, since it is larger than the sum of its proper divisors (1740063596).

1988864068 is a wasteful number, since it uses less digits than its factorization.

1988864068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1192 (or 1190 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 58.

The square root of 1988864068 is about 44596.6822532798. The cubic root of 1988864068 is about 1257.5782971878.

The spelling of 1988864068 in words is "one billion, nine hundred eighty-eight million, eight hundred sixty-four thousand, sixty-eight".