82391964 has 12 divisors (see below), whose sum is σ = 192247944. Its totient is φ = 27463984.

The previous prime is 82391963. The next prime is 82391971. The reversal of 82391964 is 46919328.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82391963) 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, 3432987 + ... + 3433010.

It is an arithmetic number, because the mean of its divisors is an integer number (16020662).

Almost surely, 2^82391964 is an apocalyptic number.

It is an amenable number.

82391964 is an abundant number, since it is smaller than the sum of its proper divisors (109855980).

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

82391964 is a wasteful number, since it uses less digits than its factorization.

82391964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6866004 (or 6866002 counting only the distinct ones).

The product of its digits is 93312, while the sum is 42.

The square root of 82391964 is about 9077.0019279496. The cubic root of 82391964 is about 435.1392763166.

The spelling of 82391964 in words is "eighty-two million, three hundred ninety-one thousand, nine hundred sixty-four".