71387446 has 64 divisors (see below), whose sum is σ = 129991680. Its totient is φ = 29082240.

The previous prime is 71387443. The next prime is 71387453. The reversal of 71387446 is 64478317.

It is a junction number, because it is equal to n+sod(n) for n = 71387399 and 71387408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71387443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 693031 + ... + 693133.

It is an arithmetic number, because the mean of its divisors is an integer number (2031120).

Almost surely, 2^71387446 is an apocalyptic number.

71387446 is a deficient number, since it is larger than the sum of its proper divisors (58604234).

71387446 is a wasteful number, since it uses less digits than its factorization.

71387446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221.

The product of its digits is 112896, while the sum is 40.

The square root of 71387446 is about 8449.1091838134. The cubic root of 71387446 is about 414.8336217949.

The spelling of 71387446 in words is "seventy-one million, three hundred eighty-seven thousand, four hundred forty-six".