827813380 has 12 divisors (see below), whose sum is σ = 1738408140. Its totient is φ = 331125344.

The previous prime is 827813347. The next prime is 827813443. The reversal of 827813380 is 83318728.

It can be written as a sum of positive squares in 2 ways, for example, as 254977024 + 572836356 = 15968^2 + 23934^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20695315 + ... + 20695354.

It is an arithmetic number, because the mean of its divisors is an integer number (144867345).

Almost surely, 2^827813380 is an apocalyptic number.

It is an amenable number.

827813380 is an abundant number, since it is smaller than the sum of its proper divisors (910594760).

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

827813380 is a wasteful number, since it uses less digits than its factorization.

827813380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41390678 (or 41390676 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 827813380 is about 28771.7462104753. The cubic root of 827813380 is about 938.9536342162.

The spelling of 827813380 in words is "eight hundred twenty-seven million, eight hundred thirteen thousand, three hundred eighty".