82719638 has 8 divisors (see below), whose sum is σ = 129474288. Its totient is φ = 39561544.

The previous prime is 82719619. The next prime is 82719643. The reversal of 82719638 is 83691728.

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

It is a Curzon number.

It is a congruent number.

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, 899081 + ... + 899172.

It is an arithmetic number, because the mean of its divisors is an integer number (16184286).

Almost surely, 2^82719638 is an apocalyptic number.

82719638 is the 4862-nd centered heptagonal number.

82719638 is a deficient number, since it is larger than the sum of its proper divisors (46754650).

82719638 is a wasteful number, since it uses less digits than its factorization.

82719638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1798278.

The product of its digits is 145152, while the sum is 44.

The square root of 82719638 is about 9095.0336997726. The cubic root of 82719638 is about 435.7153649607.

The spelling of 82719638 in words is "eighty-two million, seven hundred nineteen thousand, six hundred thirty-eight".