1345440228 has 24 divisors (see below), whose sum is σ = 3424757280. Its totient is φ = 407709120.

The previous prime is 1345440221. The next prime is 1345440233. The reversal of 1345440228 is 8220445431.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (1345440221) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5096233 + ... + 5096496.

It is an arithmetic number, because the mean of its divisors is an integer number (142698220).

Almost surely, 2^1345440228 is an apocalyptic number.

It is an amenable number.

1345440228 is an abundant number, since it is smaller than the sum of its proper divisors (2079317052).

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

1345440228 is a wasteful number, since it uses less digits than its factorization.

1345440228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10192747 (or 10192745 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 33.

The square root of 1345440228 is about 36680.2430199147. The cubic root of 1345440228 is about 1103.9637242596.

Adding to 1345440228 its reverse (8220445431), we get a palindrome (9565885659).

The spelling of 1345440228 in words is "one billion, three hundred forty-five million, four hundred forty thousand, two hundred twenty-eight".