528261213990 has 64 divisors (see below), whose sum is σ = 1293247503360. Its totient is φ = 138071182080.

The previous prime is 528261213989. The next prime is 528261214007. The reversal of 528261213990 is 99312162825.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 488796 + ... + 1138175.

It is an arithmetic number, because the mean of its divisors is an integer number (20206992240).

Almost surely, 2^528261213990 is an apocalyptic number.

528261213990 is an abundant number, since it is smaller than the sum of its proper divisors (764986289370).

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

528261213990 is a wasteful number, since it uses less digits than its factorization.

528261213990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1627197.

The product of its (nonzero) digits is 466560, while the sum is 48.

The spelling of 528261213990 in words is "five hundred twenty-eight billion, two hundred sixty-one million, two hundred thirteen thousand, nine hundred ninety".