528007385 has 8 divisors (see below), whose sum is σ = 634152456. Its totient is φ = 422043520.

The previous prime is 528007373. The next prime is 528007391. The reversal of 528007385 is 583700825.

It can be written as a sum of positive squares in 4 ways, for example, as 348232921 + 179774464 = 18661^2 + 13408^2 .

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

It is not a de Polignac number, because 528007385 - 2¹⁶ = 527941849 is a prime.

It is a super-2 number, since 2×528007385² = 557583597229076450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38804 + ... + 50613.

It is an arithmetic number, because the mean of its divisors is an integer number (79269057).

Almost surely, 2^528007385 is an apocalyptic number.

It is an amenable number.

528007385 is a deficient number, since it is larger than the sum of its proper divisors (106145071).

528007385 is a wasteful number, since it uses less digits than its factorization.

528007385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90603.

The product of its (nonzero) digits is 67200, while the sum is 38.

The square root of 528007385 is about 22978.4112810264. The cubic root of 528007385 is about 808.2517723591.

The spelling of 528007385 in words is "five hundred twenty-eight million, seven thousand, three hundred eighty-five".