82391958 has 64 divisors (see below), whose sum is σ = 206668800. Its totient is φ = 24101280.

The previous prime is 82391951. The next prime is 82391963. The reversal of 82391958 is 85919328.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82391951) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14835 + ... + 19617.

It is an arithmetic number, because the mean of its divisors is an integer number (3229200).

Almost surely, 2^82391958 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 82391958, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103334400).

82391958 is an abundant number, since it is smaller than the sum of its proper divisors (124276842).

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

82391958 is a wasteful number, since it uses less digits than its factorization.

82391958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4834 (or 4828 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 82391958 is about 9077.0015974439. The cubic root of 82391958 is about 435.1392657540.

The spelling of 82391958 in words is "eighty-two million, three hundred ninety-one thousand, nine hundred fifty-eight".