71538572 has 24 divisors (see below), whose sum is σ = 150608640. Its totient is φ = 29045520.

The previous prime is 71538569. The next prime is 71538583. The reversal of 71538572 is 27583517.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66704 + ... + 67767.

It is an arithmetic number, because the mean of its divisors is an integer number (6275360).

Almost surely, 2^71538572 is an apocalyptic number.

It is an amenable number.

71538572 is an abundant number, since it is smaller than the sum of its proper divisors (79070068).

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

71538572 is a wasteful number, since it uses less digits than its factorization.

71538572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134501 (or 134499 counting only the distinct ones).

The product of its digits is 58800, while the sum is 38.

The square root of 71538572 is about 8458.0477652943. The cubic root of 71538572 is about 415.1261473578.

The spelling of 71538572 in words is "seventy-one million, five hundred thirty-eight thousand, five hundred seventy-two".