528989640 has 64 divisors (see below), whose sum is σ = 1670500800. Its totient is φ = 133638912.

The previous prime is 528989639. The next prime is 528989641. The reversal of 528989640 is 46989825.

It is an interprime number because it is at equal distance from previous prime (528989639) and next prime (528989641).

It is not an unprimeable number, because it can be changed into a prime (528989641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113727 + ... + 118286.

It is an arithmetic number, because the mean of its divisors is an integer number (26101575).

Almost surely, 2^528989640 is an apocalyptic number.

It is an amenable number.

528989640 is an abundant number, since it is smaller than the sum of its proper divisors (1141511160).

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

528989640 is a wasteful number, since it uses less digits than its factorization.

528989640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232046 (or 232042 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 51.

The square root of 528989640 is about 22999.7747815060. The cubic root of 528989640 is about 808.7526602701.

The spelling of 528989640 in words is "five hundred twenty-eight million, nine hundred eighty-nine thousand, six hundred forty".