1129787250 has 64 divisors (see below), whose sum is σ = 2910974976. Its totient is φ = 291552000.

The previous prime is 1129787233. The next prime is 1129787257. The reversal of 1129787250 is 527879211.

It is not an unprimeable number, because it can be changed into a prime (1129787257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1047 + ... + 47546.

It is an arithmetic number, because the mean of its divisors is an integer number (45483984).

Almost surely, 2^1129787250 is an apocalyptic number.

1129787250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1129787250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1455487488).

1129787250 is an abundant number, since it is smaller than the sum of its proper divisors (1781187726).

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

1129787250 is a wasteful number, since it uses less digits than its factorization.

1129787250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48644 (or 48634 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 42.

The square root of 1129787250 is about 33612.3080135834. The cubic root of 1129787250 is about 1041.5150655819.

The spelling of 1129787250 in words is "one billion, one hundred twenty-nine million, seven hundred eighty-seven thousand, two hundred fifty".