485781816 has 128 divisors (see below), whose sum is σ = 1386604800. Its totient is φ = 140980608.

The previous prime is 485781799. The next prime is 485781833. The reversal of 485781816 is 618187584.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (485781799) and next prime (485781833).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2139895 + ... + 2140121.

It is an arithmetic number, because the mean of its divisors is an integer number (10832850).

Almost surely, 2^485781816 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 485781816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (693302400).

485781816 is an abundant number, since it is smaller than the sum of its proper divisors (900822984).

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

485781816 is a wasteful number, since it uses less digits than its factorization.

485781816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306 (or 264 counting only the distinct ones).

The product of its digits is 430080, while the sum is 48.

The square root of 485781816 is about 22040.4586159181. The cubic root of 485781816 is about 786.1047455405.

The spelling of 485781816 in words is "four hundred eighty-five million, seven hundred eighty-one thousand, eight hundred sixteen".