72182540 has 24 divisors (see below), whose sum is σ = 151981872. Its totient is φ = 28797120.

The previous prime is 72182531. The next prime is 72182543. The reversal of 72182540 is 4528127.

It is not an unprimeable number, because it can be changed into a prime (72182543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3395 + ... + 12485.

It is an arithmetic number, because the mean of its divisors is an integer number (6332578).

Almost surely, 2^72182540 is an apocalyptic number.

It is an amenable number.

72182540 is an abundant number, since it is smaller than the sum of its proper divisors (79799332).

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

72182540 is a wasteful number, since it uses less digits than its factorization.

72182540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9497 (or 9495 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 72182540 is about 8496.0308379855. The cubic root of 72182540 is about 416.3680406028.

The spelling of 72182540 in words is "seventy-two million, one hundred eighty-two thousand, five hundred forty".