71873724 has 48 divisors (see below), whose sum is σ = 184034592. Its totient is φ = 21695232.

The previous prime is 71873723. The next prime is 71873729. The reversal of 71873724 is 42737817.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71873723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3922 + ... + 12614.

It is an arithmetic number, because the mean of its divisors is an integer number (3834054).

Almost surely, 2^71873724 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71873724, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92017296).

71873724 is an abundant number, since it is smaller than the sum of its proper divisors (112160868).

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

71873724 is a wasteful number, since it uses less digits than its factorization.

71873724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8766 (or 8764 counting only the distinct ones).

The product of its digits is 65856, while the sum is 39.

The square root of 71873724 is about 8477.8372241982. The cubic root of 71873724 is about 415.7734142666.

The spelling of 71873724 in words is "seventy-one million, eight hundred seventy-three thousand, seven hundred twenty-four".