1300821830 has 32 divisors (see below), whose sum is σ = 2919248640. Its totient is φ = 405450720.

The previous prime is 1300821803. The next prime is 1300821869. The reversal of 1300821830 is 381280031.

It is a self number, because there is not a number n which added to its sum of digits gives 1300821830.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 843920 + ... + 845459.

It is an arithmetic number, because the mean of its divisors is an integer number (91226520).

Almost surely, 2^1300821830 is an apocalyptic number.

1300821830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1300821830 is an abundant number, since it is smaller than the sum of its proper divisors (1618426810).

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

1300821830 is a wasteful number, since it uses less digits than its factorization.

1300821830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1689404.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 1300821830 is about 36066.9076855779. The cubic root of 1300821830 is about 1091.6228190794.

The spelling of 1300821830 in words is "one billion, three hundred million, eight hundred twenty-one thousand, eight hundred thirty".