71212736 has 56 divisors (see below), whose sum is σ = 165482016. Its totient is φ = 29767680.

The previous prime is 71212723. The next prime is 71212783. The reversal of 71212736 is 63721217.

It is a tau number, because it is divible by the number of its divisors (56).

It is a junction number, because it is equal to n+sod(n) for n = 71212699 and 71212708.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16430 + ... + 20306.

It is an arithmetic number, because the mean of its divisors is an integer number (2955036).

Almost surely, 2^71212736 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 71212736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82741008).

71212736 is an abundant number, since it is smaller than the sum of its proper divisors (94269280).

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

71212736 is a wasteful number, since it uses less digits than its factorization.

71212736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3937 (or 3927 counting only the distinct ones).

The product of its digits is 3528, while the sum is 29.

The square root of 71212736 is about 8438.7638905233. The cubic root of 71212736 is about 414.4949311194.

The spelling of 71212736 in words is "seventy-one million, two hundred twelve thousand, seven hundred thirty-six".