1129115520 has 384 divisors, whose sum is σ = 4450904640. Its totient is φ = 261292032.

The previous prime is 1129115501. The next prime is 1129115521. The reversal of 1129115520 is 255119211.

1129115520 is a `hidden beast` number, since 1 + 1 + 29 + 115 + 520 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1129115521) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1272517 + ... + 1273403.

Almost surely, 2^1129115520 is an apocalyptic number.

1129115520 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 1129115520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2225452320).

1129115520 is an abundant number, since it is smaller than the sum of its proper divisors (3321789120).

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

1129115520 is a wasteful number, since it uses less digits than its factorization.

1129115520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942 (or 927 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 27.

The square root of 1129115520 is about 33602.3142060186. The cubic root of 1129115520 is about 1041.3086091256.

The spelling of 1129115520 in words is "one billion, one hundred twenty-nine million, one hundred fifteen thousand, five hundred twenty".