1988435372 has 96 divisors (see below), whose sum is σ = 4459069440. Its totient is φ = 753480000.

The previous prime is 1988435347. The next prime is 1988435381. The reversal of 1988435372 is 2735348891.

It is a self number, because there is not a number n which added to its sum of digits gives 1988435372.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1726997 + ... + 1728147.

It is an arithmetic number, because the mean of its divisors is an integer number (46448640).

Almost surely, 2^1988435372 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 1988435372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2229534720).

1988435372 is an abundant number, since it is smaller than the sum of its proper divisors (2470634068).

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

1988435372 is a wasteful number, since it uses less digits than its factorization.

1988435372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1323 (or 1321 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 50.

The square root of 1988435372 is about 44591.8756277419. The cubic root of 1988435372 is about 1257.4879344636.

The spelling of 1988435372 in words is "one billion, nine hundred eighty-eight million, four hundred thirty-five thousand, three hundred seventy-two".