71727990 has 32 divisors (see below), whose sum is σ = 172820736. Its totient is φ = 19052640.

The previous prime is 71727979. The next prime is 71728039. The reversal of 71727990 is 9972717.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3345 + ... + 12435.

It is an arithmetic number, because the mean of its divisors is an integer number (5400648).

Almost surely, 2^71727990 is an apocalyptic number.

71727990 is an abundant number, since it is smaller than the sum of its proper divisors (101092746).

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

71727990 is a wasteful number, since it uses less digits than its factorization.

71727990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9364.

The product of its (nonzero) digits is 55566, while the sum is 42.

The square root of 71727990 is about 8469.2378641764. The cubic root of 71727990 is about 415.4922112589.

The spelling of 71727990 in words is "seventy-one million, seven hundred twenty-seven thousand, nine hundred ninety".