72943642 has 16 divisors (see below), whose sum is σ = 113481000. Its totient is φ = 35123200.

The previous prime is 72943639. The next prime is 72943643. The reversal of 72943642 is 24634927.

It can be written as a sum of positive squares in 4 ways, for example, as 65755881 + 7187761 = 8109^2 + 2681^2 .

It is not an unprimeable number, because it can be changed into a prime (72943643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24642 + ... + 27442.

Almost surely, 2^72943642 is an apocalyptic number.

72943642 is a deficient number, since it is larger than the sum of its proper divisors (40537358).

72943642 is a wasteful number, since it uses less digits than its factorization.

72943642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3281.

The product of its digits is 72576, while the sum is 37.

The square root of 72943642 is about 8540.7050060285. The cubic root of 72943642 is about 417.8263398031.

The spelling of 72943642 in words is "seventy-two million, nine hundred forty-three thousand, six hundred forty-two".