1028950920 has 96 divisors (see below), whose sum is σ = 3349171800. Its totient is φ = 273970176.

The previous prime is 1028950873. The next prime is 1028950921. The reversal of 1028950920 is 290598201.

It can be written as a sum of positive squares in 4 ways, for example, as 1023104196 + 5846724 = 31986^2 + 2418^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1028950921) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 289474 + ... + 293006.

Almost surely, 2^1028950920 is an apocalyptic number.

1028950920 is a gapful number since it is divisible by the number (10) 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 1028950920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1674585900).

1028950920 is an abundant number, since it is smaller than the sum of its proper divisors (2320220880).

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

1028950920 is a wasteful number, since it uses less digits than its factorization.

1028950920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4359 (or 4352 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 1028950920 is about 32077.2648459933. The cubic root of 1028950920 is about 1009.5586478015.

The spelling of 1028950920 in words is "one billion, twenty-eight million, nine hundred fifty thousand, nine hundred twenty".