81674832 has 80 divisors (see below), whose sum is σ = 219985920. Its totient is φ = 26083200.

The previous prime is 81674773. The next prime is 81674833. The reversal of 81674832 is 23847618.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81674833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194719 + ... + 195137.

It is an arithmetic number, because the mean of its divisors is an integer number (2749824).

Almost surely, 2^81674832 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81674832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109992960).

81674832 is an abundant number, since it is smaller than the sum of its proper divisors (138311088).

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

81674832 is a wasteful number, since it uses less digits than its factorization.

81674832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592 (or 586 counting only the distinct ones).

The product of its digits is 64512, while the sum is 39.

The square root of 81674832 is about 9037.4129041446. The cubic root of 81674832 is about 433.8731250813.

The spelling of 81674832 in words is "eighty-one million, six hundred seventy-four thousand, eight hundred thirty-two".