71049390 has 16 divisors (see below), whose sum is σ = 170518608. Its totient is φ = 18946496.

The previous prime is 71049371. The next prime is 71049403. The reversal of 71049390 is 9394017.

It is a congruent number.

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, 1184127 + ... + 1184186.

It is an arithmetic number, because the mean of its divisors is an integer number (10657413).

Almost surely, 2^71049390 is an apocalyptic number.

71049390 is an abundant number, since it is smaller than the sum of its proper divisors (99469218).

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

71049390 is a wasteful number, since it uses less digits than its factorization.

71049390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2368323.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 71049390 is about 8429.0800209750. The cubic root of 71049390 is about 414.1777691134.

The spelling of 71049390 in words is "seventy-one million, forty-nine thousand, three hundred ninety".