71949938 has 8 divisors (see below), whose sum is σ = 109961388. Its totient is φ = 35296144.

The previous prime is 71949931. The next prime is 71949949. The reversal of 71949938 is 83994917.

It can be written as a sum of positive squares in 2 ways, for example, as 57714409 + 14235529 = 7597^2 + 3773^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (71949931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 339281 + ... + 339492.

Almost surely, 2^71949938 is an apocalyptic number.

71949938 is a deficient number, since it is larger than the sum of its proper divisors (38011450).

71949938 is a wasteful number, since it uses less digits than its factorization.

71949938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678828.

The product of its digits is 489888, while the sum is 50.

The square root of 71949938 is about 8482.3309296443. The cubic root of 71949938 is about 415.9203226655.

The spelling of 71949938 in words is "seventy-one million, nine hundred forty-nine thousand, nine hundred thirty-eight".