805966138 has 16 divisors (see below), whose sum is σ = 1268130816. Its totient is φ = 383439760.

The previous prime is 805966127. The next prime is 805966159. The reversal of 805966138 is 831669508.

It is a Harshad number since it is a multiple of its sum of digits (46).

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, 37081 + ... + 54652.

It is an arithmetic number, because the mean of its divisors is an integer number (79258176).

Almost surely, 2^805966138 is an apocalyptic number.

805966138 is a deficient number, since it is larger than the sum of its proper divisors (462164678).

805966138 is a wasteful number, since it uses less digits than its factorization.

805966138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91949.

The product of its (nonzero) digits is 311040, while the sum is 46.

The square root of 805966138 is about 28389.5427578536. The cubic root of 805966138 is about 930.6197503178.

The spelling of 805966138 in words is "eight hundred five million, nine hundred sixty-six thousand, one hundred thirty-eight".