82643694 has 48 divisors (see below), whose sum is σ = 193027536. Its totient is φ = 23520000.

The previous prime is 82643689. The next prime is 82643699. The reversal of 82643694 is 49634628.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (82643689) and next prime (82643699).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82643699) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 117544 + ... + 118244.

It is an arithmetic number, because the mean of its divisors is an integer number (4021407).

Almost surely, 2^82643694 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 82643694, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96513768).

82643694 is an abundant number, since it is smaller than the sum of its proper divisors (110383842).

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

82643694 is a wasteful number, since it uses less digits than its factorization.

82643694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121 (or 1114 counting only the distinct ones).

The product of its digits is 248832, while the sum is 42.

The square root of 82643694 is about 9090.8577153094. The cubic root of 82643694 is about 435.5819822873.

The spelling of 82643694 in words is "eighty-two million, six hundred forty-three thousand, six hundred ninety-four".