1028157268 has 6 divisors (see below), whose sum is σ = 1799275226. Its totient is φ = 514078632.

The previous prime is 1028157211. The next prime is 1028157269. The reversal of 1028157268 is 8627518201.

It can be written as a sum of positive squares in only one way, i.e., 975187984 + 52969284 = 31228^2 + 7278^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1028157268.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1028157269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128519655 + ... + 128519662.

Almost surely, 2^1028157268 is an apocalyptic number.

It is an amenable number.

1028157268 is a deficient number, since it is larger than the sum of its proper divisors (771117958).

1028157268 is a wasteful number, since it uses less digits than its factorization.

1028157268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257039321 (or 257039319 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 1028157268 is about 32064.8915170471. The cubic root of 1028157268 is about 1009.2990162626.

The spelling of 1028157268 in words is "one billion, twenty-eight million, one hundred fifty-seven thousand, two hundred sixty-eight".