71840890 has 32 divisors (see below), whose sum is σ = 141725376. Its totient is φ = 26002560.

The previous prime is 71840887. The next prime is 71840903. The reversal of 71840890 is 9804817.

It is a super-2 number, since 2×71840890² = 10322226951984200, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 24229 + ... + 27031.

It is an arithmetic number, because the mean of its divisors is an integer number (4428918).

Almost surely, 2^71840890 is an apocalyptic number.

71840890 is a deficient number, since it is larger than the sum of its proper divisors (69884486).

71840890 is a wasteful number, since it uses less digits than its factorization.

71840890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3054.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 71840890 is about 8475.9005421253. The cubic root of 71840890 is about 415.7100921749.

The spelling of 71840890 in words is "seventy-one million, eight hundred forty thousand, eight hundred ninety".