72296538 has 8 divisors (see below), whose sum is σ = 144593088. Its totient is φ = 24098844.

The previous prime is 72296537. The next prime is 72296561. The reversal of 72296538 is 83569227.

It is a sphenic number, since it is the product of 3 distinct primes.

72296538 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 72296538.

It is not an unprimeable number, because it can be changed into a prime (72296537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6024706 + ... + 6024717.

It is an arithmetic number, because the mean of its divisors is an integer number (18074136).

Almost surely, 2^72296538 is an apocalyptic number.

72296538 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

72296538 is a wasteful number, since it uses less digits than its factorization.

72296538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12049428.

The product of its digits is 181440, while the sum is 42.

The square root of 72296538 is about 8502.7370887262. The cubic root of 72296538 is about 416.5871155506.

It can be divided in two parts, 722965 and 38, that added together give a triangular number (723003 = T₁₂₀₂).

The spelling of 72296538 in words is "seventy-two million, two hundred ninety-six thousand, five hundred thirty-eight".