80861238 has 48 divisors (see below), whose sum is σ = 184036320. Its totient is φ = 25610112.

The previous prime is 80861227. The next prime is 80861239. The reversal of 80861238 is 83216808.

80861238 is a `hidden beast` number, since 8 + 0 + 8 + 612 + 38 = 666.

It is a super-4 number, since 4×80861238⁴ (a number of 33 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80861239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71058 + ... + 72186.

It is an arithmetic number, because the mean of its divisors is an integer number (3834090).

Almost surely, 2^80861238 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80861238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92018160).

80861238 is an abundant number, since it is smaller than the sum of its proper divisors (103175082).

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

80861238 is a wasteful number, since it uses less digits than its factorization.

80861238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333 (or 1330 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 80861238 is about 8992.2876955756. The cubic root of 80861238 is about 432.4276564934.

The spelling of 80861238 in words is "eighty million, eight hundred sixty-one thousand, two hundred thirty-eight".