1147136640 has 128 divisors (see below), whose sum is σ = 3937852800. Its totient is φ = 282365952.

The previous prime is 1147136633. The next prime is 1147136651. The reversal of 1147136640 is 466317411.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1981 + ... + 47939.

It is an arithmetic number, because the mean of its divisors is an integer number (30764475).

Almost surely, 2^1147136640 is an apocalyptic number.

1147136640 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 1147136640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1968926400).

1147136640 is an abundant number, since it is smaller than the sum of its proper divisors (2790716160).

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

1147136640 is a wasteful number, since it uses less digits than its factorization.

1147136640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45994 (or 45982 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 1147136640 is about 33869.4056635188. The cubic root of 1147136640 is about 1046.8192906748.

The spelling of 1147136640 in words is "one billion, one hundred forty-seven million, one hundred thirty-six thousand, six hundred forty".