820671888 has 40 divisors (see below), whose sum is σ = 2165182848. Its totient is φ = 267736192.

The previous prime is 820671881. The next prime is 820671953. The reversal of 820671888 is 888176028.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (820671881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179631 + ... + 184142.

Almost surely, 2^820671888 is an apocalyptic number.

It is an amenable number.

820671888 is an abundant number, since it is smaller than the sum of its proper divisors (1344510960).

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

820671888 is a wasteful number, since it uses less digits than its factorization.

820671888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363831 (or 363825 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 48.

The square root of 820671888 is about 28647.3713977391. The cubic root of 820671888 is about 936.2457350268.

The spelling of 820671888 in words is "eight hundred twenty million, six hundred seventy-one thousand, eight hundred eighty-eight".