1028218540 has 24 divisors (see below), whose sum is σ = 2228913792. Its totient is φ = 398019840.

The previous prime is 1028218489. The next prime is 1028218553. The reversal of 1028218540 is 458128201.

It is a Harshad number since it is a multiple of its sum of digits (31).

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 7 ways as a sum of consecutive naturals, for example, 828589 + ... + 829828.

It is an arithmetic number, because the mean of its divisors is an integer number (92871408).

Almost surely, 2^1028218540 is an apocalyptic number.

1028218540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1028218540 is an abundant number, since it is smaller than the sum of its proper divisors (1200695252).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1028218540 is a wasteful number, since it uses less digits than its factorization.

1028218540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1658457 (or 1658455 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 31.

The square root of 1028218540 is about 32065.8469403195. The cubic root of 1028218540 is about 1009.3190652515.

The spelling of 1028218540 in words is "one billion, twenty-eight million, two hundred eighteen thousand, five hundred forty".