1089639936 has 480 divisors, whose sum is σ = 4075239168. Its totient is φ = 272056320.

The previous prime is 1089639931. The next prime is 1089639983. The reversal of 1089639936 is 6399369801.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1089639931) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13128151 + ... + 13128233.

Almost surely, 2^1089639936 is an apocalyptic number.

1089639936 is a gapful number since it is divisible by the number (16) 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 1089639936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2037619584).

1089639936 is an abundant number, since it is smaller than the sum of its proper divisors (2985599232).

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

1089639936 is a wasteful number, since it uses less digits than its factorization.

1089639936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 1889568, while the sum is 54.

The square root of 1089639936 is about 33009.6945759878. The cubic root of 1089639936 is about 1029.0291338611.

The spelling of 1089639936 in words is "one billion, eighty-nine million, six hundred thirty-nine thousand, nine hundred thirty-six".