71861438 has 16 divisors (see below), whose sum is σ = 120461040. Its totient is φ = 31867200.

The previous prime is 71861423. The next prime is 71861459. The reversal of 71861438 is 83416817.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 38933 + ... + 40736.

It is an arithmetic number, because the mean of its divisors is an integer number (7528815).

Almost surely, 2^71861438 is an apocalyptic number.

71861438 is a deficient number, since it is larger than the sum of its proper divisors (48599602).

71861438 is a wasteful number, since it uses less digits than its factorization.

71861438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79723.

The product of its digits is 32256, while the sum is 38.

The square root of 71861438 is about 8477.1125980489. The cubic root of 71861438 is about 415.7497223294.

The spelling of 71861438 in words is "seventy-one million, eight hundred sixty-one thousand, four hundred thirty-eight".