82390813394 has 32 divisors (see below), whose sum is σ = 136366433280. Its totient is φ = 37203091200.

The previous prime is 82390813391. The next prime is 82390813403. The reversal of 82390813394 is 49331809328.

It is a happy number.

It is a super-2 number, since 2×82390813394² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (82390813391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 646139 + ... + 763070.

It is an arithmetic number, because the mean of its divisors is an integer number (4261451040).

Almost surely, 2^82390813394 is an apocalyptic number.

82390813394 is a deficient number, since it is larger than the sum of its proper divisors (53975619886).

82390813394 is a wasteful number, since it uses less digits than its factorization.

82390813394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1409306.

The product of its (nonzero) digits is 1119744, while the sum is 50.

Adding to 82390813394 its sum of digits (50), we get a square (82390813444 = 287038²).

The spelling of 82390813394 in words is "eighty-two billion, three hundred ninety million, eight hundred thirteen thousand, three hundred ninety-four".