1028636955 has 16 divisors (see below), whose sum is σ = 1828688160. Its totient is φ = 548606304.

The previous prime is 1028636933. The next prime is 1028636957. The reversal of 1028636955 is 5596368201.

1028636955 is a `hidden beast` number, since 1 + 0 + 2 + 8 + 636 + 9 + 5 + 5 = 666.

It is not a de Polignac number, because 1028636955 - 2⁶ = 1028636891 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1028636955.

It is not an unprimeable number, because it can be changed into a prime (1028636957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3809632 + ... + 3809901.

It is an arithmetic number, because the mean of its divisors is an integer number (114293010).

Almost surely, 2^1028636955 is an apocalyptic number.

1028636955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1028636955 is a deficient number, since it is larger than the sum of its proper divisors (800051205).

1028636955 is an equidigital number, since it uses as much as digits as its factorization.

1028636955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7619547 (or 7619541 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The square root of 1028636955 is about 32072.3705859109. The cubic root of 1028636955 is about 1009.4559547514.

The spelling of 1028636955 in words is "one billion, twenty-eight million, six hundred thirty-six thousand, nine hundred fifty-five".