1272089232 has 80 divisors (see below), whose sum is σ = 3675736960. Its totient is φ = 421200000.

The previous prime is 1272089213. The next prime is 1272089257. The reversal of 1272089232 is 2329802721.

It is a super-2 number, since 2×1272089232² = 3236422028340699648, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 55482 + ... + 74982.

It is an arithmetic number, because the mean of its divisors is an integer number (45946712).

Almost surely, 2^1272089232 is an apocalyptic number.

1272089232 is a gapful number since it is divisible by the number (12) 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 1272089232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1837868480).

1272089232 is an abundant number, since it is smaller than the sum of its proper divisors (2403647728).

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

1272089232 is a wasteful number, since it uses less digits than its factorization.

1272089232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19669 (or 19657 counting only the distinct ones).

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

The square root of 1272089232 is about 35666.3599488369. The cubic root of 1272089232 is about 1083.5256385925.

The spelling of 1272089232 in words is "one billion, two hundred seventy-two million, eighty-nine thousand, two hundred thirty-two".