1128319929 has 32 divisors (see below), whose sum is σ = 1862369280. Its totient is φ = 669272400.

The previous prime is 1128319919. The next prime is 1128319939. The reversal of 1128319929 is 9299138211.

It is an interprime number because it is at equal distance from previous prime (1128319919) and next prime (1128319939).

It is not a de Polignac number, because 1128319929 - 2¹⁷ = 1128188857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1128319909) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26457 + ... + 54374.

It is an arithmetic number, because the mean of its divisors is an integer number (58199040).

Almost surely, 2^1128319929 is an apocalyptic number.

It is an amenable number.

1128319929 is a deficient number, since it is larger than the sum of its proper divisors (734049351).

1128319929 is a wasteful number, since it uses less digits than its factorization.

1128319929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80898 (or 80892 counting only the distinct ones).

The product of its digits is 69984, while the sum is 45.

The square root of 1128319929 is about 33590.4737835000. The cubic root of 1128319929 is about 1041.0639779962.

It can be divided in two parts, 112831 and 9929, that added together give a triangular number (122760 = T₄₉₅).

The spelling of 1128319929 in words is "one billion, one hundred twenty-eight million, three hundred nineteen thousand, nine hundred twenty-nine".