71856450 has 192 divisors, whose sum is σ = 218557440. Its totient is φ = 17280000.

The previous prime is 71856443. The next prime is 71856451. The reversal of 71856450 is 5465817.

71856450 is a `hidden beast` number, since 7 + 1 + 8 + 5 + 645 + 0 = 666.

It is a super-3 number, since 3×71856450³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (71856451) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 711400 + ... + 711500.

It is an arithmetic number, because the mean of its divisors is an integer number (1138320).

Almost surely, 2^71856450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71856450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109278720).

71856450 is an abundant number, since it is smaller than the sum of its proper divisors (146700990).

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

71856450 is a wasteful number, since it uses less digits than its factorization.

71856450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170 (or 159 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 71856450 is about 8476.8183889948. The cubic root of 71856450 is about 415.7401028559.

The spelling of 71856450 in words is "seventy-one million, eight hundred fifty-six thousand, four hundred fifty".