1345444272 has 60 divisors (see below), whose sum is σ = 3777531784. Its totient is φ = 447033600.

The previous prime is 1345444259. The next prime is 1345444333. The reversal of 1345444272 is 2724445431.

1345444272 is a `hidden beast` number, since 1 + 3 + 4 + 544 + 42 + 72 = 666.

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 11 ways as a sum of consecutive naturals, for example, 30147 + ... + 59997.

Almost surely, 2^1345444272 is an apocalyptic number.

1345444272 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 1345444272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1888765892).

1345444272 is an abundant number, since it is smaller than the sum of its proper divisors (2432087512).

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

1345444272 is a wasteful number, since it uses less digits than its factorization.

1345444272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30178 (or 30169 counting only the distinct ones).

The product of its digits is 107520, while the sum is 36.

The square root of 1345444272 is about 36680.2981449170. The cubic root of 1345444272 is about 1103.9648303226.

The spelling of 1345444272 in words is "one billion, three hundred forty-five million, four hundred forty-four thousand, two hundred seventy-two".