1229086500 has 48 divisors (see below), whose sum is σ = 3579104256. Its totient is φ = 327756000.

The previous prime is 1229086487. The next prime is 1229086531. The reversal of 1229086500 is 56809221.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 408196 + ... + 411195.

It is an arithmetic number, because the mean of its divisors is an integer number (74564672).

Almost surely, 2^1229086500 is an apocalyptic number.

1229086500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1229086500 is an abundant number, since it is smaller than the sum of its proper divisors (2350017756).

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

1229086500 is a wasteful number, since it uses less digits than its factorization.

1229086500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819413 (or 819401 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 1229086500 is about 35058.3299659296. The cubic root of 1229086500 is about 1071.1759569528.

It can be divided in two parts, 12290 and 86500, that added together give a triangular number (98790 = T₄₄₄).

The spelling of 1229086500 in words is "one billion, two hundred twenty-nine million, eighty-six thousand, five hundred".