499999400 has 24 divisors (see below), whose sum is σ = 1162499070. Its totient is φ = 199999680.

The previous prime is 499999397. The next prime is 499999417. The reversal of 499999400 is 4999994.

It can be written as a sum of positive squares in 3 ways, for example, as 435389956 + 64609444 = 20866^2 + 8038^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1249799 + ... + 1250198.

Almost surely, 2^499999400 is an apocalyptic number.

499999400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

499999400 is an abundant number, since it is smaller than the sum of its proper divisors (662499670).

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

499999400 is a wasteful number, since it uses less digits than its factorization.

499999400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2500013 (or 2500004 counting only the distinct ones).

The product of its (nonzero) digits is 944784, while the sum is 53.

The square root of 499999400 is about 22360.6663585860. Note that the first 3 decimals coincide. The cubic root of 499999400 is about 793.7002085038.

499999400 divided by its reverse (4999994) gives a square (100 = 10²).

The spelling of 499999400 in words is "four hundred ninety-nine million, nine hundred ninety-nine thousand, four hundred".