1816255328 has 48 divisors (see below), whose sum is σ = 3691605456. Its totient is φ = 879083520.

The previous prime is 1816255319. The next prime is 1816255379. The reversal of 1816255328 is 8235526181.

It is a congruent 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, 149648 + ... + 161328.

It is an arithmetic number, because the mean of its divisors is an integer number (76908447).

Almost surely, 2^1816255328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1816255328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1845802728).

1816255328 is an abundant number, since it is smaller than the sum of its proper divisors (1875350128).

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

1816255328 is a wasteful number, since it uses less digits than its factorization.

1816255328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11847 (or 11839 counting only the distinct ones).

The product of its digits is 115200, while the sum is 41.

The square root of 1816255328 is about 42617.5471842292. The cubic root of 1816255328 is about 1220.0912159694.

The spelling of 1816255328 in words is "one billion, eight hundred sixteen million, two hundred fifty-five thousand, three hundred twenty-eight".