499257720 has 192 divisors, whose sum is σ = 1765501920. Its totient is φ = 121623552.

The previous prime is 499257719. The next prime is 499257743. The reversal of 499257720 is 27752994.

It is a super-3 number, since 3×499257720³ (a number of 27 digits) contains 333 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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 500262 + ... + 501258.

Almost surely, 2^499257720 is an apocalyptic number.

499257720 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 499257720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (882750960).

499257720 is an abundant number, since it is smaller than the sum of its proper divisors (1266244200).

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

499257720 is a wasteful number, since it uses less digits than its factorization.

499257720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1134 (or 1127 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 499257720 is about 22344.0757248985. The cubic root of 499257720 is about 793.3075661114.

The spelling of 499257720 in words is "four hundred ninety-nine million, two hundred fifty-seven thousand, seven hundred twenty".