1028357155 has 16 divisors (see below), whose sum is σ = 1411338240. Its totient is φ = 704649312.

The previous prime is 1028357137. The next prime is 1028357171. The reversal of 1028357155 is 5517538201.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1028357155 - 2⁵ = 1028357123 is a prime.

It is an unprimeable number.

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, 42166 + ... + 61924.

It is an arithmetic number, because the mean of its divisors is an integer number (88208640).

Almost surely, 2^1028357155 is an apocalyptic number.

1028357155 is a deficient number, since it is larger than the sum of its proper divisors (382981085).

1028357155 is a wasteful number, since it uses less digits than its factorization.

1028357155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21258.

The product of its (nonzero) digits is 42000, while the sum is 37.

The square root of 1028357155 is about 32068.0082792805. The cubic root of 1028357155 is about 1009.3644189288.

The spelling of 1028357155 in words is "one billion, twenty-eight million, three hundred fifty-seven thousand, one hundred fifty-five".