72156030 has 32 divisors (see below), whose sum is σ = 173397888. Its totient is φ = 19216800.

The previous prime is 72156017. The next prime is 72156059. The reversal of 72156030 is 3065127.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45145 + ... + 46715.

It is an arithmetic number, because the mean of its divisors is an integer number (5418684).

Almost surely, 2^72156030 is an apocalyptic number.

72156030 is an abundant number, since it is smaller than the sum of its proper divisors (101241858).

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

72156030 is a wasteful number, since it uses less digits than its factorization.

72156030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3112.

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 72156030 is about 8494.4705544254. The cubic root of 72156030 is about 416.3170621238.

The spelling of 72156030 in words is "seventy-two million, one hundred fifty-six thousand, thirty".