499978000 has 40 divisors (see below), whose sum is σ = 1208951640. Its totient is φ = 199990400.

The previous prime is 499977997. The next prime is 499978019. The reversal of 499978000 is 879994.

It can be written as a sum of positive squares in 4 ways, for example, as 56791296 + 443186704 = 7536^2 + 21052^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122995 + ... + 126994.

It is an arithmetic number, because the mean of its divisors is an integer number (30223791).

Almost surely, 2^499978000 is an apocalyptic number.

499978000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

499978000 is an abundant number, since it is smaller than the sum of its proper divisors (708973640).

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

499978000 is a wasteful number, since it uses less digits than its factorization.

499978000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250012 (or 249996 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 46.

The square root of 499978000 is about 22360.1878346314. The cubic root of 499978000 is about 793.6888848723.

The spelling of 499978000 in words is "four hundred ninety-nine million, nine hundred seventy-eight thousand".