72759838 has 4 divisors (see below), whose sum is σ = 109139760. Its totient is φ = 36379918.

The previous prime is 72759809. The next prime is 72759839. The reversal of 72759838 is 83895727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83895727 = 809 ⋅103703.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 72759791 and 72759800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72759839) 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 as a sum of consecutive naturals, namely, 18189958 + ... + 18189961.

It is an arithmetic number, because the mean of its divisors is an integer number (27284940).

Almost surely, 2^72759838 is an apocalyptic number.

72759838 is a deficient number, since it is larger than the sum of its proper divisors (36379922).

72759838 is a wasteful number, since it uses less digits than its factorization.

72759838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36379921.

The product of its digits is 846720, while the sum is 49.

The square root of 72759838 is about 8529.9377488936. The cubic root of 72759838 is about 417.4750971796.

The spelling of 72759838 in words is "seventy-two million, seven hundred fifty-nine thousand, eight hundred thirty-eight".