528390740 has 12 divisors (see below), whose sum is σ = 1109620596. Its totient is φ = 211356288.

The previous prime is 528390713. The next prime is 528390757. The reversal of 528390740 is 47093825.

It can be written as a sum of positive squares in 2 ways, for example, as 393784336 + 134606404 = 19844^2 + 11602^2 .

It is a junction number, because it is equal to n+sod(n) for n = 528390694 and 528390703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13209749 + ... + 13209788.

It is an arithmetic number, because the mean of its divisors is an integer number (92468383).

Almost surely, 2^528390740 is an apocalyptic number.

It is an amenable number.

528390740 is an abundant number, since it is smaller than the sum of its proper divisors (581229856).

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

528390740 is a wasteful number, since it uses less digits than its factorization.

528390740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26419546 (or 26419544 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 528390740 is about 22986.7514016226. The cubic root of 528390740 is about 808.4473330084.

The spelling of 528390740 in words is "five hundred twenty-eight million, three hundred ninety thousand, seven hundred forty".