810138012 has 24 divisors (see below), whose sum is σ = 1892789136. Its totient is φ = 269693568.

The previous prime is 810137927. The next prime is 810138041. The reversal of 810138012 is 210831018.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34393 + ... + 52944.

It is an arithmetic number, because the mean of its divisors is an integer number (78866214).

Almost surely, 2^810138012 is an apocalyptic number.

It is an amenable number.

810138012 is an abundant number, since it is smaller than the sum of its proper divisors (1082651124).

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

810138012 is a wasteful number, since it uses less digits than its factorization.

810138012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88117 (or 88115 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 810138012 is about 28462.9234619355. The cubic root of 810138012 is about 932.2226914182. Note that the first 3 decimals are identical.

The spelling of 810138012 in words is "eight hundred ten million, one hundred thirty-eight thousand, twelve".