988634820 has 96 divisors (see below), whose sum is σ = 2857171968. Its totient is φ = 255232512.

The previous prime is 988634749. The next prime is 988634827. The reversal of 988634820 is 28436889.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 988634820.

It is not an unprimeable number, because it can be changed into a prime (988634827) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 494062 + ... + 496058.

It is an arithmetic number, because the mean of its divisors is an integer number (29762208).

Almost surely, 2^988634820 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 988634820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1428585984).

988634820 is an abundant number, since it is smaller than the sum of its proper divisors (1868537148).

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

988634820 is a wasteful number, since it uses less digits than its factorization.

988634820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2269 (or 2267 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 48.

The square root of 988634820 is about 31442.5638267620. The cubic root of 988634820 is about 996.1971634324.

The spelling of 988634820 in words is "nine hundred eighty-eight million, six hundred thirty-four thousand, eight hundred twenty".