72381028 has 12 divisors (see below), whose sum is σ = 130090492. Its totient is φ = 35212320.

The previous prime is 72381017. The next prime is 72381047. The reversal of 72381028 is 82018327.

It can be written as a sum of positive squares in 2 ways, for example, as 24522304 + 47858724 = 4952^2 + 6918^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 244383 + ... + 244678.

Almost surely, 2^72381028 is an apocalyptic number.

It is an amenable number.

72381028 is a deficient number, since it is larger than the sum of its proper divisors (57709464).

72381028 is a wasteful number, since it uses less digits than its factorization.

72381028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489102 (or 489100 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 72381028 is about 8507.7040381057. The cubic root of 72381028 is about 416.7493351349.

The spelling of 72381028 in words is "seventy-two million, three hundred eighty-one thousand, twenty-eight".