499745640 has 64 divisors (see below), whose sum is σ = 1513287360. Its totient is φ = 132016640.

The previous prime is 499745629. The next prime is 499745647. The reversal of 499745640 is 46547994.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 499745640.

It is not an unprimeable number, because it can be changed into a prime (499745647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6621 + ... + 32300.

It is an arithmetic number, because the mean of its divisors is an integer number (23645115).

Almost surely, 2^499745640 is an apocalyptic number.

499745640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

499745640 is an abundant number, since it is smaller than the sum of its proper divisors (1013541720).

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

499745640 is a wasteful number, since it uses less digits than its factorization.

499745640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39042 (or 39038 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 48.

The square root of 499745640 is about 22354.9913889494. The cubic root of 499745640 is about 793.5659127108.

The spelling of 499745640 in words is "four hundred ninety-nine million, seven hundred forty-five thousand, six hundred forty".