1129528420 has 12 divisors (see below), whose sum is σ = 2372009724. Its totient is φ = 451811360.

The previous prime is 1129528417. The next prime is 1129528457. The reversal of 1129528420 is 248259211.

It can be written as a sum of positive squares in 2 ways, for example, as 473758756 + 655769664 = 21766^2 + 25608^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28238191 + ... + 28238230.

It is an arithmetic number, because the mean of its divisors is an integer number (197667477).

Almost surely, 2^1129528420 is an apocalyptic number.

1129528420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1129528420 is an abundant number, since it is smaller than the sum of its proper divisors (1242481304).

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

1129528420 is a wasteful number, since it uses less digits than its factorization.

1129528420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56476430 (or 56476428 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 1129528420 is about 33608.4575665114. The cubic root of 1129528420 is about 1041.4355237823.

The spelling of 1129528420 in words is "one billion, one hundred twenty-nine million, five hundred twenty-eight thousand, four hundred twenty".