72429538 has 8 divisors (see below), whose sum is σ = 110956032. Its totient is φ = 35444196.

The previous prime is 72429527. The next prime is 72429551. The reversal of 72429538 is 83592427.

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

It is a self number, because there is not a number n which added to its sum of digits gives 72429538.

It is an unprimeable number.

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, 385170 + ... + 385357.

It is an arithmetic number, because the mean of its divisors is an integer number (13869504).

Almost surely, 2^72429538 is an apocalyptic number.

72429538 is a deficient number, since it is larger than the sum of its proper divisors (38526494).

72429538 is a wasteful number, since it uses less digits than its factorization.

72429538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770576.

The product of its digits is 120960, while the sum is 40.

The square root of 72429538 is about 8510.5545060237. The cubic root of 72429538 is about 416.8424165961.

The spelling of 72429538 in words is "seventy-two million, four hundred twenty-nine thousand, five hundred thirty-eight".