1028500641 has 36 divisors (see below), whose sum is σ = 1731272400. Its totient is φ = 586657008.

The previous prime is 1028500633. The next prime is 1028500679. The reversal of 1028500641 is 1460058201.

1028500641 is a `hidden beast` number, since 10 + 2 + 8 + 5 + 0 + 0 + 641 = 666.

It is not a de Polignac number, because 1028500641 - 2³ = 1028500633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1028500691) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 288850 + ... + 292388.

It is an arithmetic number, because the mean of its divisors is an integer number (48090900).

Almost surely, 2^1028500641 is an apocalyptic number.

It is an amenable number.

1028500641 is a deficient number, since it is larger than the sum of its proper divisors (702771759).

1028500641 is a wasteful number, since it uses less digits than its factorization.

1028500641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4218 (or 4208 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 1028500641 is about 32070.2454153379. The cubic root of 1028500641 is about 1009.4113620643.

Adding to 1028500641 its reverse (1460058201), we get a palindrome (2488558842).

The spelling of 1028500641 in words is "one billion, twenty-eight million, five hundred thousand, six hundred forty-one".