1229172264 has 96 divisors (see below), whose sum is σ = 3430918920. Its totient is φ = 397260288.

The previous prime is 1229172253. The next prime is 1229172281. The reversal of 1229172264 is 4622719221.

1229172264 is a `hidden beast` number, since 1 + 229 + 172 + 264 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1229063364 + 108900 = 35058^2 + 330^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

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 23 ways as a sum of consecutive naturals, for example, 993054 + ... + 994290.

Almost surely, 2^1229172264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1229172264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1715459460).

1229172264 is an abundant number, since it is smaller than the sum of its proper divisors (2201746656).

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

1229172264 is a wasteful number, since it uses less digits than its factorization.

1229172264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1659 (or 1652 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 1229172264 is about 35059.5531061079. The cubic root of 1229172264 is about 1071.2008714450.

The spelling of 1229172264 in words is "one billion, two hundred twenty-nine million, one hundred seventy-two thousand, two hundred sixty-four".