71728494 has 8 divisors (see below), whose sum is σ = 143457000. Its totient is φ = 23909496.

The previous prime is 71728487. The next prime is 71728499. The reversal of 71728494 is 49482717.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

71728494 is an admirable number.

It is a super-3 number, since 3×71728494³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71728499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5977369 + ... + 5977380.

It is an arithmetic number, because the mean of its divisors is an integer number (17932125).

Almost surely, 2^71728494 is an apocalyptic number.

71728494 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

71728494 is a wasteful number, since it uses less digits than its factorization.

71728494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11954754.

The product of its digits is 112896, while the sum is 42.

The square root of 71728494 is about 8469.2676188676. The cubic root of 71728494 is about 415.4931844150.

The spelling of 71728494 in words is "seventy-one million, seven hundred twenty-eight thousand, four hundred ninety-four".