71918830 has 16 divisors (see below), whose sum is σ = 130475520. Its totient is φ = 28540512.

The previous prime is 71918813. The next prime is 71918837. The reversal of 71918830 is 3881917.

It is a self number, because there is not a number n which added to its sum of digits gives 71918830.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71918837) by changing a digit.

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, 27045 + ... + 29584.

It is an arithmetic number, because the mean of its divisors is an integer number (8154720).

Almost surely, 2^71918830 is an apocalyptic number.

71918830 is a deficient number, since it is larger than the sum of its proper divisors (58556690).

71918830 is a wasteful number, since it uses less digits than its factorization.

71918830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56763.

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 71918830 is about 8480.4970373204. The cubic root of 71918830 is about 415.8603721180.

The spelling of 71918830 in words is "seventy-one million, nine hundred eighteen thousand, eight hundred thirty".