1089728634 has 16 divisors (see below), whose sum is σ = 2182010688. Its totient is φ = 362817312.

The previous prime is 1089728617. The next prime is 1089728639. The reversal of 1089728634 is 4368279801.

It is not an unprimeable number, because it can be changed into a prime (1089728639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100822 + ... + 111105.

It is an arithmetic number, because the mean of its divisors is an integer number (136375668).

Almost surely, 2^1089728634 is an apocalyptic number.

1089728634 is an abundant number, since it is smaller than the sum of its proper divisors (1092282054).

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

1089728634 is a wasteful number, since it uses less digits than its factorization.

1089728634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212789.

The product of its (nonzero) digits is 580608, while the sum is 48.

The square root of 1089728634 is about 33011.0380630479. The cubic root of 1089728634 is about 1029.0570545061.

The spelling of 1089728634 in words is "one billion, eighty-nine million, seven hundred twenty-eight thousand, six hundred thirty-four".