71872436 has 12 divisors (see below), whose sum is σ = 128702112. Its totient is φ = 35100408.

The previous prime is 71872429. The next prime is 71872453. The reversal of 71872436 is 63427817.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 71872436.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208760 + ... + 209103.

It is an arithmetic number, because the mean of its divisors is an integer number (10725176).

Almost surely, 2^71872436 is an apocalyptic number.

It is an amenable number.

71872436 is a deficient number, since it is larger than the sum of its proper divisors (56829676).

71872436 is a wasteful number, since it uses less digits than its factorization.

71872436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417910 (or 417908 counting only the distinct ones).

The product of its digits is 56448, while the sum is 38.

The square root of 71872436 is about 8477.7612610877. The cubic root of 71872436 is about 415.7709306544.

The spelling of 71872436 in words is "seventy-one million, eight hundred seventy-two thousand, four hundred thirty-six".