820273136 has 10 divisors (see below), whose sum is σ = 1589279232. Its totient is φ = 410136560.

The previous prime is 820273123. The next prime is 820273141. The reversal of 820273136 is 631372028.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25633520 + ... + 25633551.

Almost surely, 2^820273136 is an apocalyptic number.

It is an amenable number.

820273136 is a deficient number, since it is larger than the sum of its proper divisors (769006096).

820273136 is a wasteful number, since it uses less digits than its factorization.

820273136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51267079 (or 51267073 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 820273136 is about 28640.4108909073. The cubic root of 820273136 is about 936.0940746023.

The spelling of 820273136 in words is "eight hundred twenty million, two hundred seventy-three thousand, one hundred thirty-six".