1663828026 has 24 divisors (see below), whose sum is σ = 3870947520. Its totient is φ = 475379352.

The previous prime is 1663828021. The next prime is 1663828031. The reversal of 1663828026 is 6208283661.

It is an interprime number because it is at equal distance from previous prime (1663828021) and next prime (1663828031).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (1663828021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2829346 + ... + 2829933.

It is an arithmetic number, because the mean of its divisors is an integer number (161289480).

Almost surely, 2^1663828026 is an apocalyptic number.

1663828026 is an abundant number, since it is smaller than the sum of its proper divisors (2207119494).

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

1663828026 is a wasteful number, since it uses less digits than its factorization.

1663828026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5659298 (or 5659291 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 1663828026 is about 40790.0481245119. The cubic root of 1663828026 is about 1184.9576028556.

The spelling of 1663828026 in words is "one billion, six hundred sixty-three million, eight hundred twenty-eight thousand, twenty-six".