1282820823 has 18 divisors (see below), whose sum is σ = 1860206712. Its totient is φ = 851880240.

The previous prime is 1282820741. The next prime is 1282820831. The reversal of 1282820823 is 3280282821.

It is not a de Polignac number, because 1282820823 - 2¹⁰ = 1282819799 is a prime.

It is a super-3 number, since 3×1282820823³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1282820873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2370933 + ... + 2371473.

Almost surely, 2^1282820823 is an apocalyptic number.

1282820823 is a deficient number, since it is larger than the sum of its proper divisors (577385889).

1282820823 is an frugal number, since it uses more digits than its factorization.

1282820823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1575 (or 1031 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 1282820823 is about 35816.4881444287. The cubic root of 1282820823 is about 1086.5640543307.

The spelling of 1282820823 in words is "one billion, two hundred eighty-two million, eight hundred twenty thousand, eight hundred twenty-three".