499980990 has 16 divisors (see below), whose sum is σ = 1199954448. Its totient is φ = 133328256.

The previous prime is 499980983. The next prime is 499980997. The reversal of 499980990 is 99089994.

It is an interprime number because it is at equal distance from previous prime (499980983) and next prime (499980997).

It is a super-2 number, since 2×499980990² = 499961980722760200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 499980990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499980997) 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, 8332987 + ... + 8333046.

It is an arithmetic number, because the mean of its divisors is an integer number (74997153).

Almost surely, 2^499980990 is an apocalyptic number.

499980990 is an abundant number, since it is smaller than the sum of its proper divisors (699973458).

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

499980990 is a wasteful number, since it uses less digits than its factorization.

499980990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16666043.

The product of its (nonzero) digits is 1889568, while the sum is 57.

The square root of 499980990 is about 22360.2546944349. The cubic root of 499980990 is about 793.6904670253.

The spelling of 499980990 in words is "four hundred ninety-nine million, nine hundred eighty thousand, nine hundred ninety".