71732730 has 16 divisors (see below), whose sum is σ = 172158624. Its totient is φ = 19128720.

The previous prime is 71732723. The next prime is 71732737. The reversal of 71732730 is 3723717.

It is an interprime number because it is at equal distance from previous prime (71732723) and next prime (71732737).

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 2391091 = 71732730 / (7 + 1 + 7 + 3 + 2 + 7 + 3 + 0).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71732737) 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, 1195516 + ... + 1195575.

It is an arithmetic number, because the mean of its divisors is an integer number (10759914).

Almost surely, 2^71732730 is an apocalyptic number.

71732730 is an abundant number, since it is smaller than the sum of its proper divisors (100425894).

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

71732730 is a wasteful number, since it uses less digits than its factorization.

71732730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2391101.

The product of its (nonzero) digits is 6174, while the sum is 30.

The square root of 71732730 is about 8469.5176958313. The cubic root of 71732730 is about 415.5013633798.

The spelling of 71732730 in words is "seventy-one million, seven hundred thirty-two thousand, seven hundred thirty".