71963776 has 32 divisors (see below), whose sum is σ = 144318780. Its totient is φ = 35742720.

The previous prime is 71963747. The next prime is 71963783. The reversal of 71963776 is 67736917.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 70963776 + 1000000 = 8424^2 + 1000^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18306 + ... + 21886.

Almost surely, 2^71963776 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 71963776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72159390).

71963776 is an abundant number, since it is smaller than the sum of its proper divisors (72355004).

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

71963776 is a wasteful number, since it uses less digits than its factorization.

71963776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3752 (or 3740 counting only the distinct ones).

The product of its digits is 333396, while the sum is 46.

The square root of 71963776 is about 8483.1465860257. The cubic root of 71963776 is about 415.9469853546.

The spelling of 71963776 in words is "seventy-one million, nine hundred sixty-three thousand, seven hundred seventy-six".