71749158 has 32 divisors (see below), whose sum is σ = 155774976. Its totient is φ = 21899808.

The previous prime is 71749127. The next prime is 71749169. The reversal of 71749158 is 85194717.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6285 + ... + 13527.

It is an arithmetic number, because the mean of its divisors is an integer number (4867968).

Almost surely, 2^71749158 is an apocalyptic number.

71749158 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 71749158, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77887488).

71749158 is an abundant number, since it is smaller than the sum of its proper divisors (84025818).

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

71749158 is a wasteful number, since it uses less digits than its factorization.

71749158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7388.

The product of its digits is 70560, while the sum is 42.

The square root of 71749158 is about 8470.4874712144. The cubic root of 71749158 is about 415.5330798890.

The spelling of 71749158 in words is "seventy-one million, seven hundred forty-nine thousand, one hundred fifty-eight".