71493504 has 128 divisors (see below), whose sum is σ = 205632000. Its totient is φ = 21934080.

The previous prime is 71493481. The next prime is 71493547. The reversal of 71493504 is 40539417.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×71493504² = 10222642228396032, which contains 22 as substring.

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, 299017 + ... + 299255.

It is an arithmetic number, because the mean of its divisors is an integer number (1606500).

Almost surely, 2^71493504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71493504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102816000).

71493504 is an abundant number, since it is smaller than the sum of its proper divisors (134138496).

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

71493504 is a wasteful number, since it uses less digits than its factorization.

71493504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316 (or 304 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 71493504 is about 8455.3831373865. The cubic root of 71493504 is about 415.0389550697.

The spelling of 71493504 in words is "seventy-one million, four hundred ninety-three thousand, five hundred four".