1345475280 has 80 divisors (see below), whose sum is σ = 4183821504. Its totient is φ = 357688320.

The previous prime is 1345475273. The next prime is 1345475303. The reversal of 1345475280 is 825745431.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70972 + ... + 87908.

Almost surely, 2^1345475280 is an apocalyptic number.

1345475280 is a gapful number since it is divisible by the number (10) 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 1345475280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2091910752).

1345475280 is an abundant number, since it is smaller than the sum of its proper divisors (2838346224).

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

1345475280 is a wasteful number, since it uses less digits than its factorization.

1345475280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17284 (or 17278 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 39.

The square root of 1345475280 is about 36680.7208217069. The cubic root of 1345475280 is about 1103.9733111591.

The spelling of 1345475280 in words is "one billion, three hundred forty-five million, four hundred seventy-five thousand, two hundred eighty".