71832978 has 72 divisors (see below), whose sum is σ = 181988352. Its totient is φ = 20058192.

The previous prime is 71832961. The next prime is 71832997. The reversal of 71832978 is 87923817.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 565551 + ... + 565677.

It is an arithmetic number, because the mean of its divisors is an integer number (2527616).

Almost surely, 2^71832978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71832978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90994176).

71832978 is an abundant number, since it is smaller than the sum of its proper divisors (110155374).

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

71832978 is a wasteful number, since it uses less digits than its factorization.

71832978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276 (or 206 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 71832978 is about 8475.4337942078. The cubic root of 71832978 is about 415.6948305832.

The spelling of 71832978 in words is "seventy-one million, eight hundred thirty-two thousand, nine hundred seventy-eight".