72746636 has 6 divisors (see below), whose sum is σ = 127306620. Its totient is φ = 36373316.

The previous prime is 72746633. The next prime is 72746651. The reversal of 72746636 is 63664727.

It is a junction number, because it is equal to n+sod(n) for n = 72746593 and 72746602.

It is not an unprimeable number, because it can be changed into a prime (72746633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9093326 + ... + 9093333.

It is an arithmetic number, because the mean of its divisors is an integer number (21217770).

Almost surely, 2^72746636 is an apocalyptic number.

It is an amenable number.

72746636 is a deficient number, since it is larger than the sum of its proper divisors (54559984).

72746636 is a wasteful number, since it uses less digits than its factorization.

72746636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18186663 (or 18186661 counting only the distinct ones).

The product of its digits is 254016, while the sum is 41.

The square root of 72746636 is about 8529.1638511638. The cubic root of 72746636 is about 417.4498458882.

The spelling of 72746636 in words is "seventy-two million, seven hundred forty-six thousand, six hundred thirty-six".