828365881 has 4 divisors (see below), whose sum is σ = 946703872. Its totient is φ = 710027892.

The previous prime is 828365869. The next prime is 828365893. The reversal of 828365881 is 188563828.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (828365869) and next prime (828365893).

It is not a de Polignac number, because 828365881 - 2¹³ = 828357689 is a prime.

It is a super-2 number, since 2×828365881² = 1372380065609812322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (828365381) 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, 59168985 + ... + 59168998.

It is an arithmetic number, because the mean of its divisors is an integer number (236675968).

Almost surely, 2^828365881 is an apocalyptic number.

It is an amenable number.

828365881 is a deficient number, since it is larger than the sum of its proper divisors (118337991).

828365881 is a wasteful number, since it uses less digits than its factorization.

828365881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118337990.

The product of its digits is 737280, while the sum is 49.

The square root of 828365881 is about 28781.3460595574. The cubic root of 828365881 is about 939.1624805833.

The spelling of 828365881 in words is "eight hundred twenty-eight million, three hundred sixty-five thousand, eight hundred eighty-one".