71838730 has 16 divisors (see below), whose sum is σ = 130520160. Its totient is φ = 28466512.

The previous prime is 71838721. The next prime is 71838731. The reversal of 71838730 is 3783817.

It is a self number, because there is not a number n which added to its sum of digits gives 71838730.

It is not an unprimeable number, because it can be changed into a prime (71838731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32500 + ... + 34639.

It is an arithmetic number, because the mean of its divisors is an integer number (8157510).

Almost surely, 2^71838730 is an apocalyptic number.

71838730 is a deficient number, since it is larger than the sum of its proper divisors (58681430).

71838730 is a wasteful number, since it uses less digits than its factorization.

71838730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67253.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 71838730 is about 8475.7731210787. The cubic root of 71838730 is about 415.7059258253.

The spelling of 71838730 in words is "seventy-one million, eight hundred thirty-eight thousand, seven hundred thirty".