80971776 has 144 divisors (see below), whose sum is σ = 245306880. Its totient is φ = 25681920.

The previous prime is 80971769. The next prime is 80971789. The reversal of 80971776 is 67717908.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-4 number, since 4×80971776⁴ (a number of 33 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 423841 + ... + 424031.

It is an arithmetic number, because the mean of its divisors is an integer number (1703520).

Almost surely, 2^80971776 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 80971776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122653440).

80971776 is an abundant number, since it is smaller than the sum of its proper divisors (164335104).

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

80971776 is a wasteful number, since it uses less digits than its factorization.

80971776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242 (or 219 counting only the distinct ones).

The product of its (nonzero) digits is 148176, while the sum is 45.

The square root of 80971776 is about 8998.4318633860. The cubic root of 80971776 is about 432.6246108691.

The spelling of 80971776 in words is "eighty million, nine hundred seventy-one thousand, seven hundred seventy-six".