82278642 has 8 divisors (see below), whose sum is σ = 164557296. Its totient is φ = 27426212.

The previous prime is 82278641. The next prime is 82278661. The reversal of 82278642 is 24687228.

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

82278642 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 82278642.

It is not an unprimeable number, because it can be changed into a prime (82278641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6856548 + ... + 6856559.

It is an arithmetic number, because the mean of its divisors is an integer number (20569662).

Almost surely, 2^82278642 is an apocalyptic number.

82278642 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

82278642 is a wasteful number, since it uses less digits than its factorization.

82278642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13713112.

The product of its digits is 86016, while the sum is 39.

The square root of 82278642 is about 9070.7575207366. The cubic root of 82278642 is about 434.9396877671.

The spelling of 82278642 in words is "eighty-two million, two hundred seventy-eight thousand, six hundred forty-two".