71955438 has 16 divisors (see below), whose sum is σ = 148873680. Its totient is φ = 23158016.

The previous prime is 71955427. The next prime is 71955479. The reversal of 71955438 is 83455917.

It is a self number, because there is not a number n which added to its sum of digits gives 71955438.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206595 + ... + 206942.

It is an arithmetic number, because the mean of its divisors is an integer number (9304605).

Almost surely, 2^71955438 is an apocalyptic number.

71955438 is an abundant number, since it is smaller than the sum of its proper divisors (76918242).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71955438 is a wasteful number, since it uses less digits than its factorization.

71955438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413571.

The product of its digits is 151200, while the sum is 42.

The square root of 71955438 is about 8482.6551267867. The cubic root of 71955438 is about 415.9309203280.

The spelling of 71955438 in words is "seventy-one million, nine hundred fifty-five thousand, four hundred thirty-eight".