499431018240 has 1728 divisors, whose sum is σ = 2283705930240. Its totient is φ = 103464345600.

The previous prime is 499431018239. The next prime is 499431018287. The reversal of 499431018240 is 42810134994.

499431018240 is a `hidden beast` number, since 4 + 9 + 94 + 310 + 1 + 8 + 240 = 666.

It is a tau number, because it is divible by the number of its divisors (1728).

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 191 ways as a sum of consecutive naturals, for example, 1508854875 + ... + 1508855205.

It is an arithmetic number, because the mean of its divisors is an integer number (1321589080).

Almost surely, 2^499431018240 is an apocalyptic number.

499431018240 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 499431018240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1141852965120).

499431018240 is an abundant number, since it is smaller than the sum of its proper divisors (1784274912000).

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

499431018240 is an equidigital number, since it uses as much as digits as its factorization.

499431018240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398 (or 359 counting only the distinct ones).

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

The spelling of 499431018240 in words is "four hundred ninety-nine billion, four hundred thirty-one million, eighteen thousand, two hundred forty".