1179818640 has 480 divisors, whose sum is σ = 5323159296. Its totient is φ = 226160640.

The previous prime is 1179818639. The next prime is 1179818641. The reversal of 1179818640 is 468189711.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1179818639) and next prime (1179818641).

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

It is not an unprimeable number, because it can be changed into a prime (1179818641) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 719902 + ... + 721538.

Almost surely, 2^1179818640 is an apocalyptic number.

1179818640 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 1179818640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2661579648).

1179818640 is an abundant number, since it is smaller than the sum of its proper divisors (4143340656).

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

1179818640 is a wasteful number, since it uses less digits than its factorization.

1179818640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1687 (or 1678 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 45.

The square root of 1179818640 is about 34348.4881763375. The cubic root of 1179818640 is about 1056.6676648955.

It can be divided in two parts, 117981 and 8640, that added together give a palindrome (126621).

The spelling of 1179818640 in words is "one billion, one hundred seventy-nine million, eight hundred eighteen thousand, six hundred forty".