71708890 has 64 divisors (see below), whose sum is σ = 154027008. Its totient is φ = 23731200.

The previous prime is 71708809. The next prime is 71708893. The reversal of 71708890 is 9880717.

It is not an unprimeable number, because it can be changed into a prime (71708893) 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 31 ways as a sum of consecutive naturals, for example, 57352 + ... + 58588.

It is an arithmetic number, because the mean of its divisors is an integer number (2406672).

Almost surely, 2^71708890 is an apocalyptic number.

71708890 is an abundant number, since it is smaller than the sum of its proper divisors (82318118).

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

71708890 is a wasteful number, since it uses less digits than its factorization.

71708890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1303.

The product of its (nonzero) digits is 28224, while the sum is 40.

The square root of 71708890 is about 8468.1101787825. The cubic root of 71708890 is about 415.4553283734.

The spelling of 71708890 in words is "seventy-one million, seven hundred eight thousand, eight hundred ninety".