520728390000 has 1800 divisors, whose sum is σ = 2362959510912. Its totient is φ = 105960960000.

The previous prime is 520728389977. The next prime is 520728390019. The reversal of 520728390000 is 93827025.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (1800).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 359 ways as a sum of consecutive naturals, for example, 1777229854 + ... + 1777230146.

Almost surely, 2^520728390000 is an apocalyptic number.

520728390000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520728390000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1181479755456).

520728390000 is an abundant number, since it is smaller than the sum of its proper divisors (1842231120912).

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

520728390000 is a wasteful number, since it uses less digits than its factorization.

520728390000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385 (or 354 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The spelling of 520728390000 in words is "five hundred twenty billion, seven hundred twenty-eight million, three hundred ninety thousand".