71393938 has 32 divisors (see below), whose sum is σ = 134120448. Its totient is φ = 27690000.

The previous prime is 71393929. The next prime is 71393947. The reversal of 71393938 is 83939317.

It is an interprime number because it is at equal distance from previous prime (71393929) and next prime (71393947).

It is a junction number, because it is equal to n+sod(n) for n = 71393894 and 71393903.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37731 + ... + 39577.

It is an arithmetic number, because the mean of its divisors is an integer number (4191264).

Almost surely, 2^71393938 is an apocalyptic number.

71393938 is a deficient number, since it is larger than the sum of its proper divisors (62726510).

71393938 is a wasteful number, since it uses less digits than its factorization.

71393938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2118.

The product of its digits is 122472, while the sum is 43.

The square root of 71393938 is about 8449.4933575925. The cubic root of 71393938 is about 414.8461964533.

The spelling of 71393938 in words is "seventy-one million, three hundred ninety-three thousand, nine hundred thirty-eight".