1147787472 has 80 divisors (see below), whose sum is σ = 3197920320. Its totient is φ = 352644096.

The previous prime is 1147787447. The next prime is 1147787479. The reversal of 1147787472 is 2747877411.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1147787479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 803623 + ... + 805049.

It is an arithmetic number, because the mean of its divisors is an integer number (39974004).

Almost surely, 2^1147787472 is an apocalyptic number.

1147787472 is a gapful number since it is divisible by the number (12) 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 1147787472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1598960160).

1147787472 is an abundant number, since it is smaller than the sum of its proper divisors (2050132848).

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

1147787472 is a wasteful number, since it uses less digits than its factorization.

1147787472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2740 (or 2734 counting only the distinct ones).

The product of its digits is 614656, while the sum is 48.

The square root of 1147787472 is about 33879.0122642323. The cubic root of 1147787472 is about 1047.0172254464.

The spelling of 1147787472 in words is "one billion, one hundred forty-seven million, seven hundred eighty-seven thousand, four hundred seventy-two".