80868842 has 4 divisors (see below), whose sum is σ = 121303266. Its totient is φ = 40434420.

The previous prime is 80868841. The next prime is 80868857. The reversal of 80868842 is 24886808.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 77774761 + 3094081 = 8819^2 + 1759^2 .

It is a junction number, because it is equal to n+sod(n) for n = 80868793 and 80868802.

It is not an unprimeable number, because it can be changed into a prime (80868841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20217209 + ... + 20217212.

Almost surely, 2^80868842 is an apocalyptic number.

80868842 is a deficient number, since it is larger than the sum of its proper divisors (40434424).

80868842 is a wasteful number, since it uses less digits than its factorization.

80868842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40434423.

The product of its (nonzero) digits is 196608, while the sum is 44.

The square root of 80868842 is about 8992.7104923933. The cubic root of 80868842 is about 432.4412108939.

The spelling of 80868842 in words is "eighty million, eight hundred sixty-eight thousand, eight hundred forty-two".