499987720 has 32 divisors (see below), whose sum is σ = 1143420120. Its totient is φ = 196715520.

The previous prime is 499987711. The next prime is 499987723. The reversal of 499987720 is 27789994.

It can be written as a sum of positive squares in 4 ways, for example, as 307721764 + 192265956 = 17542^2 + 13866^2 .

It is not an unprimeable number, because it can be changed into a prime (499987723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100017 + ... + 104896.

Almost surely, 2^499987720 is an apocalyptic number.

499987720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

499987720 is an abundant number, since it is smaller than the sum of its proper divisors (643432400).

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

499987720 is a wasteful number, since it uses less digits than its factorization.

499987720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204985 (or 204981 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 55.

The square root of 499987720 is about 22360.4051841643. The cubic root of 499987720 is about 793.6940281693.

The spelling of 499987720 in words is "four hundred ninety-nine million, nine hundred eighty-seven thousand, seven hundred twenty".