1028456915 has 8 divisors (see below), whose sum is σ = 1264249728. Its totient is φ = 802697920.

The previous prime is 1028456903. The next prime is 1028456927. The reversal of 1028456915 is 5196548201.

1028456915 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1028456903) and next prime (1028456927).

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

It is not a de Polignac number, because 1028456915 - 2⁸ = 1028456659 is a prime.

It is a super-2 number, since 2×1028456915² = 2115447252022634450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2508227 + ... + 2508636.

It is an arithmetic number, because the mean of its divisors is an integer number (158031216).

Almost surely, 2^1028456915 is an apocalyptic number.

1028456915 is a deficient number, since it is larger than the sum of its proper divisors (235792813).

1028456915 is an equidigital number, since it uses as much as digits as its factorization.

1028456915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5016909.

The product of its (nonzero) digits is 86400, while the sum is 41.

The square root of 1028456915 is about 32069.5636858377. The cubic root of 1028456915 is about 1009.3970570507.

The spelling of 1028456915 in words is "one billion, twenty-eight million, four hundred fifty-six thousand, nine hundred fifteen".