528387390 has 48 divisors (see below), whose sum is σ = 1375672896. Its totient is φ = 140712000.

The previous prime is 528387373. The next prime is 528387403. The reversal of 528387390 is 93783825.

528387390 is a `hidden beast` number, since 528 + 38 + 7 + 3 + 90 = 666.

It is a super-2 number, since 2×528387390² = 558386467822024200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70315 + ... + 77465.

It is an arithmetic number, because the mean of its divisors is an integer number (28659852).

Almost surely, 2^528387390 is an apocalyptic number.

528387390 is an abundant number, since it is smaller than the sum of its proper divisors (847285506).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

528387390 is a wasteful number, since it uses less digits than its factorization.

528387390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7985 (or 7982 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 528387390 is about 22986.6785334463. The cubic root of 528387390 is about 808.4456244847.

The spelling of 528387390 in words is "five hundred twenty-eight million, three hundred eighty-seven thousand, three hundred ninety".