81880234 has 8 divisors (see below), whose sum is σ = 129284640. Its totient is φ = 38785356.

The previous prime is 81880229. The next prime is 81880241. The reversal of 81880234 is 43208818.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 81880234.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1077334 + ... + 1077409.

It is an arithmetic number, because the mean of its divisors is an integer number (16160580).

Almost surely, 2^81880234 is an apocalyptic number.

81880234 is a deficient number, since it is larger than the sum of its proper divisors (47404406).

81880234 is a wasteful number, since it uses less digits than its factorization.

81880234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2154764.

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 81880234 is about 9048.7697506346. The cubic root of 81880234 is about 434.2365328469.

The spelling of 81880234 in words is "eighty-one million, eight hundred eighty thousand, two hundred thirty-four".