1028755634 has 8 divisors (see below), whose sum is σ = 1547271660. Its totient is φ = 512998416.

The previous prime is 1028755631. The next prime is 1028755649. The reversal of 1028755634 is 4365578201.

It can be written as a sum of positive squares in 2 ways, for example, as 1011558025 + 17197609 = 31805^2 + 4147^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1028755591 and 1028755600.

It is not an unprimeable number, because it can be changed into a prime (1028755631) 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, 688769 + ... + 690260.

Almost surely, 2^1028755634 is an apocalyptic number.

1028755634 is a deficient number, since it is larger than the sum of its proper divisors (518516026).

1028755634 is a wasteful number, since it uses less digits than its factorization.

1028755634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379404.

The product of its (nonzero) digits is 201600, while the sum is 41.

The square root of 1028755634 is about 32074.2207076025. The cubic root of 1028755634 is about 1009.4947752558.

The spelling of 1028755634 in words is "one billion, twenty-eight million, seven hundred fifty-five thousand, six hundred thirty-four".