1089973836 has 216 divisors, whose sum is σ = 3574050480. Its totient is φ = 277530624.

The previous prime is 1089973813. The next prime is 1089973879. The reversal of 1089973836 is 6383799801.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 568816 + ... + 570728.

It is an arithmetic number, because the mean of its divisors is an integer number (16546530).

Almost surely, 2^1089973836 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 1089973836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1787025240).

1089973836 is an abundant number, since it is smaller than the sum of its proper divisors (2484076644).

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

1089973836 is a wasteful number, since it uses less digits than its factorization.

1089973836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1973 (or 1961 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The square root of 1089973836 is about 33014.7517937058. The cubic root of 1089973836 is about 1029.1342321070.

The spelling of 1089973836 in words is "one billion, eighty-nine million, nine hundred seventy-three thousand, eight hundred thirty-six".