72266536 has 8 divisors (see below), whose sum is σ = 135499770. Its totient is φ = 36133264.

The previous prime is 72266533. The next prime is 72266561. The reversal of 72266536 is 63566227.

It can be written as a sum of positive squares in only one way, i.e., 51926436 + 20340100 = 7206^2 + 4510^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 72266495 and 72266504.

It is not an unprimeable number, because it can be changed into a prime (72266533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4516651 + ... + 4516666.

Almost surely, 2^72266536 is an apocalyptic number.

It is an amenable number.

72266536 is a deficient number, since it is larger than the sum of its proper divisors (63233234).

72266536 is a wasteful number, since it uses less digits than its factorization.

72266536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9033323 (or 9033319 counting only the distinct ones).

The product of its digits is 90720, while the sum is 37.

The square root of 72266536 is about 8500.9726502324. The cubic root of 72266536 is about 416.5294817354.

The spelling of 72266536 in words is "seventy-two million, two hundred sixty-six thousand, five hundred thirty-six".