81976050 has 168 divisors, whose sum is σ = 247616964. Its totient is φ = 20062080.

The previous prime is 81976039. The next prime is 81976073. The reversal of 81976050 is 5067918.

It can be written as a sum of positive squares in 6 ways, for example, as 33074001 + 48902049 = 5751^2 + 6993^2 .

It is a junction number, because it is equal to n+sod(n) for n = 81975996 and 81976014.

It is an unprimeable number.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 473764 + ... + 473936.

Almost surely, 2^81976050 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81976050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123808482).

81976050 is an abundant number, since it is smaller than the sum of its proper divisors (165640914).

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

81976050 is a wasteful number, since it uses less digits than its factorization.

81976050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216 (or 196 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 81976050 is about 9054.0626240379. The cubic root of 81976050 is about 434.4058475755.

The spelling of 81976050 in words is "eighty-one million, nine hundred seventy-six thousand, fifty".