82819390 has 32 divisors (see below), whose sum is σ = 152681760. Its totient is φ = 32333184.

The previous prime is 82819339. The next prime is 82819403. The reversal of 82819390 is 9391828.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162456 + ... + 162964.

It is an arithmetic number, because the mean of its divisors is an integer number (4771305).

Almost surely, 2^82819390 is an apocalyptic number.

82819390 is a deficient number, since it is larger than the sum of its proper divisors (69862370).

82819390 is a wasteful number, since it uses less digits than its factorization.

82819390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 82819390 is about 9100.5159194411. The cubic root of 82819390 is about 435.8904383406.

It can be divided in two parts, 8281 and 9390, that added together give a palindrome (17671).

The spelling of 82819390 in words is "eighty-two million, eight hundred nineteen thousand, three hundred ninety".