72277136 has 10 divisors (see below), whose sum is σ = 140036982. Its totient is φ = 36138560.

The previous prime is 72277087. The next prime is 72277141. The reversal of 72277136 is 63177227.

It can be written as a sum of positive squares in only one way, i.e., 65286400 + 6990736 = 8080^2 + 2644^2 .

It is a junction number, because it is equal to n+sod(n) for n = 72277096 and 72277105.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2258645 + ... + 2258676.

Almost surely, 2^72277136 is an apocalyptic number.

It is an amenable number.

72277136 is a deficient number, since it is larger than the sum of its proper divisors (67759846).

72277136 is a wasteful number, since it uses less digits than its factorization.

72277136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4517329 (or 4517323 counting only the distinct ones).

The product of its digits is 24696, while the sum is 35.

The square root of 72277136 is about 8501.5960854418. The cubic root of 72277136 is about 416.5498461480.

Subtracting from 72277136 its reverse (63177227), we obtain a palindrome (9099909).

The spelling of 72277136 in words is "seventy-two million, two hundred seventy-seven thousand, one hundred thirty-six".