71679990 has 32 divisors (see below), whose sum is σ = 182152800. Its totient is φ = 17990144.

The previous prime is 71679961. The next prime is 71679991. The reversal of 71679990 is 9997617.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71679991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69765 + ... + 70784.

It is an arithmetic number, because the mean of its divisors is an integer number (5692275).

Almost surely, 2^71679990 is an apocalyptic number.

71679990 is an abundant number, since it is smaller than the sum of its proper divisors (110472810).

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

71679990 is a wasteful number, since it uses less digits than its factorization.

71679990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140576.

The product of its (nonzero) digits is 214326, while the sum is 48.

The square root of 71679990 is about 8466.4036048372. The cubic root of 71679990 is about 415.3995088308.

The spelling of 71679990 in words is "seventy-one million, six hundred seventy-nine thousand, nine hundred ninety".