1089726090 has 32 divisors (see below), whose sum is σ = 2646858816. Its totient is φ = 287091840.

The previous prime is 1089726073. The next prime is 1089726101. The reversal of 1089726090 is 906279801.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 216331 + ... + 221310.

It is an arithmetic number, because the mean of its divisors is an integer number (82714338).

Almost surely, 2^1089726090 is an apocalyptic number.

1089726090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1089726090 is an abundant number, since it is smaller than the sum of its proper divisors (1557132726).

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

1089726090 is a wasteful number, since it uses less digits than its factorization.

1089726090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437734.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 1089726090 is about 33010.9995304595. Note that the first 3 decimals coincide. The cubic root of 1089726090 is about 1029.0562537186.

The spelling of 1089726090 in words is "one billion, eighty-nine million, seven hundred twenty-six thousand, ninety".