499629780 has 144 divisors (see below), whose sum is σ = 1644224400. Its totient is φ = 122075136.

The previous prime is 499629773. The next prime is 499629791. The reversal of 499629780 is 87926994.

499629780 = 65² + 66² + ... + 1144².

499629780 is a `hidden beast` number, since 4 + 9 + 9 + 629 + 7 + 8 + 0 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 44916804 + 454712976 = 6702^2 + 21324^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 347944 + ... + 349376.

It is an arithmetic number, because the mean of its divisors is an integer number (11418225).

Almost surely, 2^499629780 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 499629780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (822112200).

499629780 is an abundant number, since it is smaller than the sum of its proper divisors (1144594620).

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

499629780 is a wasteful number, since it uses less digits than its factorization.

499629780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1610 (or 1605 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The square root of 499629780 is about 22352.3998711548. The cubic root of 499629780 is about 793.5045817420.

The spelling of 499629780 in words is "four hundred ninety-nine million, six hundred twenty-nine thousand, seven hundred eighty".