81572348 has 24 divisors (see below), whose sum is σ = 167709360. Its totient is φ = 34225920.

The previous prime is 81572321. The next prime is 81572357. The reversal of 81572348 is 84327518.

It is a congruent number.

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, 70733 + ... + 71876.

It is an arithmetic number, because the mean of its divisors is an integer number (6987890).

Almost surely, 2^81572348 is an apocalyptic number.

It is an amenable number.

81572348 is an abundant number, since it is smaller than the sum of its proper divisors (86137012).

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

81572348 is a wasteful number, since it uses less digits than its factorization.

81572348 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142637 (or 142635 counting only the distinct ones).

The product of its digits is 53760, while the sum is 38.

The square root of 81572348 is about 9031.7411388945. The cubic root of 81572348 is about 433.6915772564.

The spelling of 81572348 in words is "eighty-one million, five hundred seventy-two thousand, three hundred forty-eight".