1089940698 has 320 divisors, whose sum is σ = 3311953920. Its totient is φ = 259459200.

The previous prime is 1089940661. The next prime is 1089940699. The reversal of 1089940698 is 8960499801.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1089940699) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 8320093 + ... + 8320223.

It is an arithmetic number, because the mean of its divisors is an integer number (10349856).

Almost surely, 2^1089940698 is an apocalyptic number.

1089940698 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1089940698, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1655976960).

1089940698 is an abundant number, since it is smaller than the sum of its proper divisors (2222013222).

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

1089940698 is a wasteful number, since it uses less digits than its factorization.

1089940698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215 (or 206 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The square root of 1089940698 is about 33014.2499233286. The cubic root of 1089940698 is about 1029.1238025613.

The spelling of 1089940698 in words is "one billion, eighty-nine million, nine hundred forty thousand, six hundred ninety-eight".