1183949616 has 160 divisors (see below), whose sum is σ = 3252648960. Its totient is φ = 370685952.

The previous prime is 1183949609. The next prime is 1183949617. The reversal of 1183949616 is 6169493811.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (1183949617) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8641900 + ... + 8642036.

It is an arithmetic number, because the mean of its divisors is an integer number (20329056).

Almost surely, 2^1183949616 is an apocalyptic number.

1183949616 is a gapful number since it is divisible by the number (16) 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 1183949616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1626324480).

1183949616 is an abundant number, since it is smaller than the sum of its proper divisors (2068699344).

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

1183949616 is a wasteful number, since it uses less digits than its factorization.

1183949616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323 (or 317 counting only the distinct ones).

The product of its digits is 279936, while the sum is 48.

The square root of 1183949616 is about 34408.5689327528. The cubic root of 1183949616 is about 1057.8994881425.

The spelling of 1183949616 in words is "one billion, one hundred eighty-three million, nine hundred forty-nine thousand, six hundred sixteen".