71540352 has 192 divisors, whose sum is σ = 235577160. Its totient is φ = 20643840.

The previous prime is 71540323. The next prime is 71540363. The reversal of 71540352 is 25304517.

It is a happy number.

71540352 is a `hidden beast` number, since 71 + 540 + 3 + 52 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 63107136 + 8433216 = 7944^2 + 2904^2 .

It is a tau number, because it is divible by the number of its divisors (192).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 254452 + ... + 254732.

Almost surely, 2^71540352 is an apocalyptic number.

71540352 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71540352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117788580).

71540352 is an abundant number, since it is smaller than the sum of its proper divisors (164036808).

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

71540352 is a wasteful number, since it uses less digits than its factorization.

71540352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331 (or 316 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 71540352 is about 8458.1529898672. The cubic root of 71540352 is about 415.1295903416.

Adding to 71540352 its reverse (25304517), we get a palindrome (96844869).

The spelling of 71540352 in words is "seventy-one million, five hundred forty thousand, three hundred fifty-two".