72808642 has 8 divisors (see below), whose sum is σ = 109376316. Its totient is φ = 36349872.

The previous prime is 72808613. The next prime is 72808643. The reversal of 72808642 is 24680827.

It can be written as a sum of positive squares in 2 ways, for example, as 58813561 + 13995081 = 7669^2 + 3741^2 .

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

It is not an unprimeable number, because it can be changed into a prime (72808643) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 25533 + ... + 28240.

Almost surely, 2^72808642 is an apocalyptic number.

72808642 is a deficient number, since it is larger than the sum of its proper divisors (36567674).

72808642 is a wasteful number, since it uses less digits than its factorization.

72808642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54452.

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 72808642 is about 8532.7980170633. The cubic root of 72808642 is about 417.5684174392.

The spelling of 72808642 in words is "seventy-two million, eight hundred eight thousand, six hundred forty-two".