1345720830 has 16 divisors (see below), whose sum is σ = 3229730064. Its totient is φ = 358858880.

The previous prime is 1345720813. The next prime is 1345720837. The reversal of 1345720830 is 380275431.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1345720791 and 1345720800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1345720837) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22428651 + ... + 22428710.

It is an arithmetic number, because the mean of its divisors is an integer number (201858129).

Almost surely, 2^1345720830 is an apocalyptic number.

1345720830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1345720830 is an abundant number, since it is smaller than the sum of its proper divisors (1884009234).

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

1345720830 is a wasteful number, since it uses less digits than its factorization.

1345720830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44857371.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 1345720830 is about 36684.0677951614. The cubic root of 1345720830 is about 1104.0404656586.

The spelling of 1345720830 in words is "one billion, three hundred forty-five million, seven hundred twenty thousand, eight hundred thirty".