1115216640 has 432 divisors, whose sum is σ = 4204835040. Its totient is φ = 279797760.

The previous prime is 1115216639. The next prime is 1115216659. The reversal of 1115216640 is 466125111.

1115216640 is a `hidden beast` number, since 1 + 1 + 1 + 5 + 2 + 16 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (432).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18282210 + ... + 18282270.

Almost surely, 2^1115216640 is an apocalyptic number.

1115216640 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 1115216640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2102417520).

1115216640 is an abundant number, since it is smaller than the sum of its proper divisors (3089618400).

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

1115216640 is an equidigital number, since it uses as much as digits as its factorization.

1115216640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1115216640 is about 33394.8594846572. The cubic root of 1115216640 is about 1037.0182839441.

The spelling of 1115216640 in words is "one billion, one hundred fifteen million, two hundred sixteen thousand, six hundred forty".