1020720750 has 128 divisors (see below), whose sum is σ = 2929305600. Its totient is φ = 231897600.

The previous prime is 1020720737. The next prime is 1020720791. The reversal of 1020720750 is 570270201.

It is a self number, because there is not a number n which added to its sum of digits gives 1020720750.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1044262 + ... + 1045238.

It is an arithmetic number, because the mean of its divisors is an integer number (22885200).

Almost surely, 2^1020720750 is an apocalyptic number.

1020720750 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1020720750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1464652800).

1020720750 is an abundant number, since it is smaller than the sum of its proper divisors (1908584850).

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

1020720750 is a wasteful number, since it uses less digits than its factorization.

1020720750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1203 (or 1193 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 24.

The square root of 1020720750 is about 31948.7206316622. The cubic root of 1020720750 is about 1006.8597528594.

Adding to 1020720750 its reverse (570270201), we get a palindrome (1590990951).

The spelling of 1020720750 in words is "one billion, twenty million, seven hundred twenty thousand, seven hundred fifty".