72442786 has 16 divisors (see below), whose sum is σ = 117170424. Its totient is φ = 33393024.

The previous prime is 72442771. The next prime is 72442793. The reversal of 72442786 is 68724427.

It can be written as a sum of positive squares in 4 ways, for example, as 28419561 + 44023225 = 5331^2 + 6635^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30390 + ... + 32686.

Almost surely, 2^72442786 is an apocalyptic number.

72442786 is a deficient number, since it is larger than the sum of its proper divisors (44727638).

72442786 is a wasteful number, since it uses less digits than its factorization.

72442786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3525.

The product of its digits is 150528, while the sum is 40.

The square root of 72442786 is about 8511.3327980992. The cubic root of 72442786 is about 416.8678297623.

The spelling of 72442786 in words is "seventy-two million, four hundred forty-two thousand, seven hundred eighty-six".