71689290 has 16 divisors (see below), whose sum is σ = 172054368. Its totient is φ = 19117136.

The previous prime is 71689283. The next prime is 71689291. The reversal of 71689290 is 9298617.

It is not an unprimeable number, because it can be changed into a prime (71689291) by changing a digit.

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, 1194792 + ... + 1194851.

It is an arithmetic number, because the mean of its divisors is an integer number (10753398).

Almost surely, 2^71689290 is an apocalyptic number.

71689290 is an abundant number, since it is smaller than the sum of its proper divisors (100365078).

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

71689290 is a wasteful number, since it uses less digits than its factorization.

71689290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2389653.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 71689290 is about 8466.9528166868. The cubic root of 71689290 is about 415.4174731579.

The spelling of 71689290 in words is "seventy-one million, six hundred eighty-nine thousand, two hundred ninety".