200000000 has 90 divisors (see below), whose sum is σ = 499511463. Its totient is φ = 80000000.

The previous prime is 199999991. The next prime is 200000033. The reversal of 200000000 is 2.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 5 ways, for example, as 190660864 + 9339136 = 13808^2 + 3056^2 .

It is a sliding number, since 200000000 = 100000000 + 100000000 and 1/100000000 + 1/100000000 = 0.0000000200000000.

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=10000.

It is a Harshad number since it is a multiple of its sum of digits (2).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 39999998 + ... + 40000002.

Almost surely, 2^200000000 is an apocalyptic number.

200000000 is a gapful number since it is divisible by the number (20) 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 200000000

200000000 is an abundant number, since it is smaller than the sum of its proper divisors (299511463).

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

200000000 is an frugal number, since it uses more digits than its factorization.

200000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58 (or 7 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 2.

The square root of 200000000 is about 14142.1356237310. The cubic root of 200000000 is about 584.8035476426.

The spelling of 200000000 in words is "two hundred million", and thus it is an aban number.