499997780 has 12 divisors (see below), whose sum is σ = 1049995380. Its totient is φ = 199999104.

The previous prime is 499997731. The next prime is 499997783. The reversal of 499997780 is 87799994.

It can be written as a sum of positive squares in 2 ways, for example, as 238270096 + 261727684 = 15436^2 + 16178^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499997783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12499925 + ... + 12499964.

It is an arithmetic number, because the mean of its divisors is an integer number (87499615).

Almost surely, 2^499997780 is an apocalyptic number.

It is an amenable number.

499997780 is an abundant number, since it is smaller than the sum of its proper divisors (549997600).

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

499997780 is a wasteful number, since it uses less digits than its factorization.

499997780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24999898 (or 24999896 counting only the distinct ones).

The product of its (nonzero) digits is 10287648, while the sum is 62.

The square root of 499997780 is about 22360.6301342337. The cubic root of 499997780 is about 793.6993513056.

The spelling of 499997780 in words is "four hundred ninety-nine million, nine hundred ninety-seven thousand, seven hundred eighty".