71861044 has 12 divisors (see below), whose sum is σ = 126160804. Its totient is φ = 35815104.

The previous prime is 71861033. The next prime is 71861063. The reversal of 71861044 is 44016817.

It can be written as a sum of positive squares in 2 ways, for example, as 1468944 + 70392100 = 1212^2 + 8390^2 .

It is a junction number, because it is equal to n+sod(n) for n = 71860997 and 71861015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27447 + ... + 29950.

Almost surely, 2^71861044 is an apocalyptic number.

It is an amenable number.

71861044 is a deficient number, since it is larger than the sum of its proper divisors (54299760).

71861044 is a wasteful number, since it uses less digits than its factorization.

71861044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57714 (or 57712 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 71861044 is about 8477.0893589722. The cubic root of 71861044 is about 415.7489625075.

The spelling of 71861044 in words is "seventy-one million, eight hundred sixty-one thousand, forty-four".