1028861051 has 4 divisors (see below), whose sum is σ = 1042955112. Its totient is φ = 1014766992.

The previous prime is 1028861023. The next prime is 1028861059. The reversal of 1028861051 is 1501688201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1028861051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1028860999 and 1028861017.

It is not an unprimeable number, because it can be changed into a prime (1028861059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7046921 + ... + 7047066.

It is an arithmetic number, because the mean of its divisors is an integer number (260738778).

Almost surely, 2^1028861051 is an apocalyptic number.

1028861051 is a deficient number, since it is larger than the sum of its proper divisors (14094061).

1028861051 is an equidigital number, since it uses as much as digits as its factorization.

1028861051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14094060.

The product of its (nonzero) digits is 3840, while the sum is 32.

The square root of 1028861051 is about 32075.8639945988. The cubic root of 1028861051 is about 1009.5292551888.

The spelling of 1028861051 in words is "one billion, twenty-eight million, eight hundred sixty-one thousand, fifty-one".