499861440 has 336 divisors, whose sum is σ = 1886102400. Its totient is φ = 121485312.

The previous prime is 499861433. The next prime is 499861451. The reversal of 499861440 is 44168994.

It is a super-2 number, since 2×499861440² = 499722918397747200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6327321 + ... + 6327399.

It is an arithmetic number, because the mean of its divisors is an integer number (5613400).

Almost surely, 2^499861440 is an apocalyptic number.

499861440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 499861440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (943051200).

499861440 is an abundant number, since it is smaller than the sum of its proper divisors (1386240960).

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

499861440 is a wasteful number, since it uses less digits than its factorization.

499861440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141 (or 102 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 499861440 is about 22357.5812645286. The cubic root of 499861440 is about 793.6272024473.

The spelling of 499861440 in words is "four hundred ninety-nine million, eight hundred sixty-one thousand, four hundred forty".