1185648640 has 208 divisors, whose sum is σ = 3279021120. Its totient is φ = 406978560.

The previous prime is 1185648631. The next prime is 1185648641. The reversal of 1185648640 is 468465811.

It is not an unprimeable number, because it can be changed into a prime (1185648641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4280182 + ... + 4280458.

Almost surely, 2^1185648640 is an apocalyptic number.

1185648640 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 1185648640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1639510560).

1185648640 is an abundant number, since it is smaller than the sum of its proper divisors (2093372480).

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

1185648640 is a wasteful number, since it uses less digits than its factorization.

1185648640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336 (or 314 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 43.

The square root of 1185648640 is about 34433.2490479769. The cubic root of 1185648640 is about 1058.4052916263.

The spelling of 1185648640 in words is "one billion, one hundred eighty-five million, six hundred forty-eight thousand, six hundred forty".