71919290 has 16 divisors (see below), whose sum is σ = 130644360. Its totient is φ = 28503360.

The previous prime is 71919271. The next prime is 71919293. The reversal of 71919290 is 9291917.

It can be written as a sum of positive squares in 4 ways, for example, as 69039481 + 2879809 = 8309^2 + 1697^2 .

It is not an unprimeable number, because it can be changed into a prime (71919293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31901 + ... + 34080.

Almost surely, 2^71919290 is an apocalyptic number.

71919290 is a deficient number, since it is larger than the sum of its proper divisors (58725070).

71919290 is a wasteful number, since it uses less digits than its factorization.

71919290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66097.

The product of its (nonzero) digits is 10206, while the sum is 38.

The square root of 71919290 is about 8480.5241583289. The cubic root of 71919290 is about 415.8612587443.

The spelling of 71919290 in words is "seventy-one million, nine hundred nineteen thousand, two hundred ninety".