528720738 has 32 divisors (see below), whose sum is σ = 1301467776. Its totient is φ = 139442688.

The previous prime is 528720737. The next prime is 528720743. The reversal of 528720738 is 837027825.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 528720738.

It is not an unprimeable number, because it can be changed into a prime (528720737) 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, 483631 + ... + 484722.

It is an arithmetic number, because the mean of its divisors is an integer number (40670868).

Almost surely, 2^528720738 is an apocalyptic number.

528720738 is an abundant number, since it is smaller than the sum of its proper divisors (772747038).

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

528720738 is a wasteful number, since it uses less digits than its factorization.

528720738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 968378.

The product of its (nonzero) digits is 188160, while the sum is 42.

The square root of 528720738 is about 22993.9282855279. The cubic root of 528720738 is about 808.6155989418.

The spelling of 528720738 in words is "five hundred twenty-eight million, seven hundred twenty thousand, seven hundred thirty-eight".