1129647472 has 20 divisors (see below), whose sum is σ = 2189949120. Its totient is φ = 564499328.

The previous prime is 1129647439. The next prime is 1129647473. The reversal of 1129647472 is 2747469211.

It is a super-2 number, since 2×1129647472² = 2552206821991981568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1129647473) 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 3 ways as a sum of consecutive naturals, for example, 9804 + ... + 48532.

It is an arithmetic number, because the mean of its divisors is an integer number (109497456).

Almost surely, 2^1129647472 is an apocalyptic number.

It is an amenable number.

1129647472 is a deficient number, since it is larger than the sum of its proper divisors (1060301648).

1129647472 is a wasteful number, since it uses less digits than its factorization.

1129647472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40560 (or 40554 counting only the distinct ones).

The product of its digits is 169344, while the sum is 43.

The square root of 1129647472 is about 33610.2286811619. The cubic root of 1129647472 is about 1041.4721115075.

The spelling of 1129647472 in words is "one billion, one hundred twenty-nine million, six hundred forty-seven thousand, four hundred seventy-two".