1345490728 has 16 divisors (see below), whose sum is σ = 2609788500. Its totient is φ = 649547136.

The previous prime is 1345490723. The next prime is 1345490743. The reversal of 1345490728 is 8270945431.

It can be written as a sum of positive squares in 2 ways, for example, as 1227941764 + 117548964 = 35042^2 + 10842^2 .

It is not an unprimeable number, because it can be changed into a prime (1345490723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2899533 + ... + 2899996.

Almost surely, 2^1345490728 is an apocalyptic number.

It is an amenable number.

1345490728 is a deficient number, since it is larger than the sum of its proper divisors (1264297772).

1345490728 is a wasteful number, since it uses less digits than its factorization.

1345490728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5799564 (or 5799560 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 1345490728 is about 36680.9313949360. The cubic root of 1345490728 is about 1103.9775362124.

The spelling of 1345490728 in words is "one billion, three hundred forty-five million, four hundred ninety thousand, seven hundred twenty-eight".