820888936442 has 8 divisors (see below), whose sum is σ = 1238450939316. Its totient is φ = 408071956672.

The previous prime is 820888936411. The next prime is 820888936459. The reversal of 820888936442 is 244639888028.

It can be written as a sum of positive squares in 2 ways, for example, as 761743182841 + 59145753601 = 872779^2 + 243199^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 1186255343 + ... + 1186256034.

Almost surely, 2^820888936442 is an apocalyptic number.

820888936442 is a deficient number, since it is larger than the sum of its proper divisors (417562002874).

820888936442 is a wasteful number, since it uses less digits than its factorization.

820888936442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2372511552.

The product of its (nonzero) digits is 42467328, while the sum is 62.

The spelling of 820888936442 in words is "eight hundred twenty billion, eight hundred eighty-eight million, nine hundred thirty-six thousand, four hundred forty-two".