1115959680 has 640 divisors, whose sum is σ = 4620844800. Its totient is φ = 253808640.

The previous prime is 1115959673. The next prime is 1115959703. The reversal of 1115959680 is 869595111.

1115959680 is a `hidden beast` number, since 1 + 1 + 1 + 59 + 596 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (640).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 10834509 + ... + 10834611.

It is an arithmetic number, because the mean of its divisors is an integer number (7220070).

Almost surely, 2^1115959680 is an apocalyptic number.

1115959680 is a gapful number since it is divisible by the number (10) 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 1115959680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2310422400).

1115959680 is an abundant number, since it is smaller than the sum of its proper divisors (3504885120).

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

1115959680 is a wasteful number, since it uses less digits than its factorization.

1115959680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 45.

The square root of 1115959680 is about 33405.9826977145. The cubic root of 1115959680 is about 1037.2485456319.

The spelling of 1115959680 in words is "one billion, one hundred fifteen million, nine hundred fifty-nine thousand, six hundred eighty".