1180861500 has 384 divisors, whose sum is σ = 4355979264. Its totient is φ = 241920000.

The previous prime is 1180861483. The next prime is 1180861543. The reversal of 1180861500 is 51680811.

It is a happy number.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 5596395 + ... + 5596605.

It is an arithmetic number, because the mean of its divisors is an integer number (11343696).

Almost surely, 2^1180861500 is an apocalyptic number.

1180861500 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 1180861500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2177989632).

1180861500 is an abundant number, since it is smaller than the sum of its proper divisors (3175117764).

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

1180861500 is a wasteful number, since it uses less digits than its factorization.

1180861500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294 (or 282 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 30.

The square root of 1180861500 is about 34363.6654040281. The cubic root of 1180861500 is about 1056.9789081901.

The spelling of 1180861500 in words is "one billion, one hundred eighty million, eight hundred sixty-one thousand, five hundred".