72682738 has 4 divisors (see below), whose sum is σ = 109024110. Its totient is φ = 36341368.

The previous prime is 72682699. The next prime is 72682759. The reversal of 72682738 is 83728627.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83728627 = 67 ⋅1249681.

It can be written as a sum of positive squares in only one way, i.e., 72641529 + 41209 = 8523^2 + 203^2 .

It is a junction number, because it is equal to n+sod(n) for n = 72682694 and 72682703.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18170683 + ... + 18170686.

Almost surely, 2^72682738 is an apocalyptic number.

72682738 is a deficient number, since it is larger than the sum of its proper divisors (36341372).

72682738 is a wasteful number, since it uses less digits than its factorization.

72682738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36341371.

The product of its digits is 225792, while the sum is 43.

The square root of 72682738 is about 8525.4171745434. The cubic root of 72682738 is about 417.3275858295.

The spelling of 72682738 in words is "seventy-two million, six hundred eighty-two thousand, seven hundred thirty-eight".