71867830 has 16 divisors (see below), whose sum is σ = 129515760. Its totient is φ = 28712992.

The previous prime is 71867819. The next prime is 71867837. The reversal of 71867830 is 3876817.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71867837) 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, 5676 + ... + 13264.

It is an arithmetic number, because the mean of its divisors is an integer number (8094735).

Almost surely, 2^71867830 is an apocalyptic number.

71867830 is a deficient number, since it is larger than the sum of its proper divisors (57647930).

71867830 is a wasteful number, since it uses less digits than its factorization.

71867830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8543.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 71867830 is about 8477.4896048300. The cubic root of 71867830 is about 415.7620487987.

The spelling of 71867830 in words is "seventy-one million, eight hundred sixty-seven thousand, eight hundred thirty".