1115987770 has 8 divisors (see below), whose sum is σ = 2008778004. Its totient is φ = 446395104.

The previous prime is 1115987767. The next prime is 1115987777. The reversal of 1115987770 is 777895111.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 995844249 + 120143521 = 31557^2 + 10961^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1115987770.

It is not an unprimeable number, because it can be changed into a prime (1115987777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55799379 + ... + 55799398.

Almost surely, 2^1115987770 is an apocalyptic number.

1115987770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1115987770 is a deficient number, since it is larger than the sum of its proper divisors (892790234).

1115987770 is a wasteful number, since it uses less digits than its factorization.

1115987770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111598784.

The product of its (nonzero) digits is 123480, while the sum is 46.

The square root of 1115987770 is about 33406.4031287417. The cubic root of 1115987770 is about 1037.2572484753.

The spelling of 1115987770 in words is "one billion, one hundred fifteen million, nine hundred eighty-seven thousand, seven hundred seventy".