72577528 has 8 divisors (see below), whose sum is σ = 136082880. Its totient is φ = 36288760.

The previous prime is 72577513. The next prime is 72577529. The reversal of 72577528 is 82577527.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72577529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4536088 + ... + 4536103.

It is an arithmetic number, because the mean of its divisors is an integer number (17010360).

Almost surely, 2^72577528 is an apocalyptic number.

It is an amenable number.

72577528 is a deficient number, since it is larger than the sum of its proper divisors (63505352).

72577528 is a wasteful number, since it uses less digits than its factorization.

72577528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9072197 (or 9072193 counting only the distinct ones).

The product of its digits is 274400, while the sum is 43.

The square root of 72577528 is about 8519.2445674485. The cubic root of 72577528 is about 417.1261247075.

Subtracting 72577528 from its reverse (82577527), we obtain a palindrome (9999999).

It can be divided in two parts, 72 and 577528, that added together give a square (577600 = 760²).

The spelling of 72577528 in words is "seventy-two million, five hundred seventy-seven thousand, five hundred twenty-eight".