7528280537 has 8 divisors (see below), whose sum is σ = 7698852360. Its totient is φ = 7358765440.

The previous prime is 7528280533. The next prime is 7528280569. The reversal of 7528280537 is 7350828257.

It is a happy number.

7528280537 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 58308496 + 7469972041 = 7636^2 + 86429^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7528280537 - 2² = 7528280533 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7528280491 and 7528280500.

It is not an unprimeable number, because it can be changed into a prime (7528280533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 249764 + ... + 278277.

It is an arithmetic number, because the mean of its divisors is an integer number (962356545).

Almost surely, 2^7528280537 is an apocalyptic number.

It is an amenable number.

7528280537 is a deficient number, since it is larger than the sum of its proper divisors (170571823).

7528280537 is a wasteful number, since it uses less digits than its factorization.

7528280537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528363.

The product of its (nonzero) digits is 940800, while the sum is 47.

The square root of 7528280537 is about 86765.6645050333. The cubic root of 7528280537 is about 1959.8910581716.

The spelling of 7528280537 in words is "seven billion, five hundred twenty-eight million, two hundred eighty thousand, five hundred thirty-seven".