820877238 has 24 divisors (see below), whose sum is σ = 1779468600. Its totient is φ = 273487104.

The previous prime is 820877209. The next prime is 820877251. The reversal of 820877238 is 832778028.

It is a junction number, because it is equal to n+sod(n) for n = 820877193 and 820877202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28758 + ... + 49686.

It is an arithmetic number, because the mean of its divisors is an integer number (74144525).

Almost surely, 2^820877238 is an apocalyptic number.

820877238 is an abundant number, since it is smaller than the sum of its proper divisors (958591362).

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

820877238 is a wasteful number, since it uses less digits than its factorization.

820877238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23116 (or 23113 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 45.

The square root of 820877238 is about 28650.9552720324. The cubic root of 820877238 is about 936.3238182133.

The spelling of 820877238 in words is "eight hundred twenty million, eight hundred seventy-seven thousand, two hundred thirty-eight".