1988990344 has 64 divisors (see below), whose sum is σ = 4327421760. Its totient is φ = 847011840.

The previous prime is 1988990329. The next prime is 1988990351. The reversal of 1988990344 is 4430998891.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 336664 + ... + 342520.

It is an arithmetic number, because the mean of its divisors is an integer number (67615965).

Almost surely, 2^1988990344 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 1988990344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2163710880).

1988990344 is an abundant number, since it is smaller than the sum of its proper divisors (2338431416).

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

1988990344 is a wasteful number, since it uses less digits than its factorization.

1988990344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6118 (or 6114 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 55.

The square root of 1988990344 is about 44598.0979863491. The cubic root of 1988990344 is about 1257.6049118099.

The spelling of 1988990344 in words is "one billion, nine hundred eighty-eight million, nine hundred ninety thousand, three hundred forty-four".