72636026 has 4 divisors (see below), whose sum is σ = 108954042. Its totient is φ = 36318012.

The previous prime is 72636017. The next prime is 72636029. The reversal of 72636026 is 62063627.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 70576801 + 2059225 = 8401^2 + 1435^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 72635983 and 72636001.

It is not an unprimeable number, because it can be changed into a prime (72636029) 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, 18159005 + ... + 18159008.

Almost surely, 2^72636026 is an apocalyptic number.

72636026 is a deficient number, since it is larger than the sum of its proper divisors (36318016).

72636026 is a wasteful number, since it uses less digits than its factorization.

72636026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36318015.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 72636026 is about 8522.6771615497. The cubic root of 72636026 is about 417.2381634787.

The spelling of 72636026 in words is "seventy-two million, six hundred thirty-six thousand, twenty-six".