1345555280 has 40 divisors (see below), whose sum is σ = 3129954432. Its totient is φ = 537957504.

The previous prime is 1345555273. The next prime is 1345555349. The reversal of 1345555280 is 825555431.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 286229 + ... + 290891.

Almost surely, 2^1345555280 is an apocalyptic number.

1345555280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1345555280 is an abundant number, since it is smaller than the sum of its proper divisors (1784399152).

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

1345555280 is a wasteful number, since it uses less digits than its factorization.

1345555280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8283 (or 8277 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 38.

The square root of 1345555280 is about 36681.8112966086. The cubic root of 1345555280 is about 1103.9951909403.

The spelling of 1345555280 in words is "one billion, three hundred forty-five million, five hundred fifty-five thousand, two hundred eighty".