82728394 has 16 divisors (see below), whose sum is σ = 149284800. Its totient is φ = 33588864.

The previous prime is 82728391. The next prime is 82728407. The reversal of 82728394 is 49382728.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 82728394.

It is not an unprimeable number, because it can be changed into a prime (82728391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155239 + ... + 155770.

It is an arithmetic number, because the mean of its divisors is an integer number (9330300).

Almost surely, 2^82728394 is an apocalyptic number.

82728394 is a deficient number, since it is larger than the sum of its proper divisors (66556406).

82728394 is a wasteful number, since it uses less digits than its factorization.

82728394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311037.

The product of its digits is 193536, while the sum is 43.

The square root of 82728394 is about 9095.5150486380. The cubic root of 82728394 is about 435.7307381305.

The spelling of 82728394 in words is "eighty-two million, seven hundred twenty-eight thousand, three hundred ninety-four".