71730490 has 16 divisors (see below), whose sum is σ = 139047048. Its totient is φ = 26485056.

The previous prime is 71730473. The next prime is 71730541. The reversal of 71730490 is 9403717.

It can be written as a sum of positive squares in 4 ways, for example, as 27468081 + 44262409 = 5241^2 + 6653^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275757 + ... + 276016.

Almost surely, 2^71730490 is an apocalyptic number.

71730490 is a deficient number, since it is larger than the sum of its proper divisors (67316558).

71730490 is a wasteful number, since it uses less digits than its factorization.

71730490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551793.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 71730490 is about 8469.3854558640. The cubic root of 71730490 is about 415.4970383771.

The spelling of 71730490 in words is "seventy-one million, seven hundred thirty thousand, four hundred ninety".