989636736 has 288 divisors, whose sum is σ = 3101187600. Its totient is φ = 279290880.

The previous prime is 989636731. The next prime is 989636761. The reversal of 989636736 is 637636989.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (989636731) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 16773475 + ... + 16773533.

Almost surely, 2^989636736 is an apocalyptic number.

989636736 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 989636736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1550593800).

989636736 is an abundant number, since it is smaller than the sum of its proper divisors (2111550864).

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

989636736 is a wasteful number, since it uses less digits than its factorization.

989636736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136 (or 94 counting only the distinct ones).

The product of its digits is 8817984, while the sum is 57.

The square root of 989636736 is about 31458.4922715632. The cubic root of 989636736 is about 996.5335764588.

The spelling of 989636736 in words is "nine hundred eighty-nine million, six hundred thirty-six thousand, seven hundred thirty-six".