71800916 has 36 divisors (see below), whose sum is σ = 139482420. Its totient is φ = 32313600.

The previous prime is 71800909. The next prime is 71800919. The reversal of 71800916 is 61900817.

It can be written as a sum of positive squares in 2 ways, for example, as 30250000 + 41550916 = 5500^2 + 6446^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71800919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52076 + ... + 53436.

Almost surely, 2^71800916 is an apocalyptic number.

It is an amenable number.

71800916 is a deficient number, since it is larger than the sum of its proper divisors (67681504).

71800916 is a wasteful number, since it uses less digits than its factorization.

71800916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1496 (or 1483 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 71800916 is about 8473.5421164941. The cubic root of 71800916 is about 415.6329741700.

Subtracting from 71800916 its reverse (61900817), we obtain a palindrome (9900099).

The spelling of 71800916 in words is "seventy-one million, eight hundred thousand, nine hundred sixteen".