499943664 has 100 divisors (see below), whose sum is σ = 1578570840. Its totient is φ = 151493760.

The previous prime is 499943659. The next prime is 499943669. The reversal of 499943664 is 466349994.

499943664 is a `hidden beast` number, since 499 + 94 + 3 + 6 + 64 = 666.

It is an interprime number because it is at equal distance from previous prime (499943659) and next prime (499943669).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 499943664.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499943669) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3279 + ... + 31790.

Almost surely, 2^499943664 is an apocalyptic number.

499943664 is a gapful number since it is divisible by the number (44) 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 499943664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (789285420).

499943664 is an abundant number, since it is smaller than the sum of its proper divisors (1078627176).

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

499943664 is a wasteful number, since it uses less digits than its factorization.

499943664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35100 (or 35085 counting only the distinct ones).

The product of its digits is 5038848, while the sum is 54.

The square root of 499943664 is about 22359.4200282565. The cubic root of 499943664 is about 793.6707155893.

The spelling of 499943664 in words is "four hundred ninety-nine million, nine hundred forty-three thousand, six hundred sixty-four".