1028263320 has 96 divisors (see below), whose sum is σ = 3819273120. Its totient is φ = 235031040.

The previous prime is 1028263307. The next prime is 1028263331. The reversal of 1028263320 is 233628201.

1028263320 is a `hidden beast` number, since 1 + 0 + 2 + 8 + 2 + 633 + 20 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 201501 + ... + 206540.

It is an arithmetic number, because the mean of its divisors is an integer number (39784095).

Almost surely, 2^1028263320 is an apocalyptic number.

1028263320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1028263320 is an abundant number, since it is smaller than the sum of its proper divisors (2791009800).

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

1028263320 is a wasteful number, since it uses less digits than its factorization.

1028263320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408065 (or 408058 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 1028263320 is about 32066.5451834151. The cubic root of 1028263320 is about 1009.3337173415. Note that the first 3 decimals are identical.

The spelling of 1028263320 in words is "one billion, twenty-eight million, two hundred sixty-three thousand, three hundred twenty".