72381026 has 4 divisors (see below), whose sum is σ = 108571542. Its totient is φ = 36190512.

The previous prime is 72381017. The next prime is 72381047. The reversal of 72381026 is 62018327.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 49350625 + 23030401 = 7025^2 + 4799^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 72381026.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18095255 + ... + 18095258.

Almost surely, 2^72381026 is an apocalyptic number.

72381026 is a deficient number, since it is larger than the sum of its proper divisors (36190516).

72381026 is a wasteful number, since it uses less digits than its factorization.

72381026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36190515.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 72381026 is about 8507.7039205652. The cubic root of 72381026 is about 416.7493312964.

The spelling of 72381026 in words is "seventy-two million, three hundred eighty-one thousand, twenty-six".