988616640 has 224 divisors, whose sum is σ = 3626290944. Its totient is φ = 225525760.

The previous prime is 988616627. The next prime is 988616663. The reversal of 988616640 is 46616889.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 988616640.

It is a congruent number.

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, 176767 + ... + 182273.

Almost surely, 2^988616640 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 988616640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1813145472).

988616640 is an abundant number, since it is smaller than the sum of its proper divisors (2637674304).

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

988616640 is a wasteful number, since it uses less digits than its factorization.

988616640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5555 (or 5545 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 48.

The square root of 988616640 is about 31442.2747268705. The cubic root of 988616640 is about 996.1910570403.

It can be divided in two parts, 98861 and 6640, that added together give a palindrome (105501).

The spelling of 988616640 in words is "nine hundred eighty-eight million, six hundred sixteen thousand, six hundred forty".