72277648 has 10 divisors (see below), whose sum is σ = 140037974. Its totient is φ = 36138816.

The previous prime is 72277627. The next prime is 72277649. The reversal of 72277648 is 84677227.

It can be written as a sum of positive squares in only one way, i.e., 69755904 + 2521744 = 8352^2 + 1588^2 .

It is not an unprimeable number, because it can be changed into a prime (72277649) 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, 2258661 + ... + 2258692.

Almost surely, 2^72277648 is an apocalyptic number.

It is an amenable number.

72277648 is a deficient number, since it is larger than the sum of its proper divisors (67760326).

72277648 is a wasteful number, since it uses less digits than its factorization.

72277648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4517361 (or 4517355 counting only the distinct ones).

The product of its digits is 263424, while the sum is 43.

The square root of 72277648 is about 8501.6261973813. The cubic root of 72277648 is about 416.5508297371.

The spelling of 72277648 in words is "seventy-two million, two hundred seventy-seven thousand, six hundred forty-eight".