200155400 has 24 divisors (see below), whose sum is σ = 465361770. Its totient is φ = 80062080.

The previous prime is 200155379. The next prime is 200155409. The reversal of 200155400 is 4551002.

It can be written as a sum of positive squares in 3 ways, for example, as 178008964 + 22146436 = 13342^2 + 4706^2 .

200155400 is a modest number, since divided by 155400 gives 200 as remainder.

It is not an unprimeable number, because it can be changed into a prime (200155409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 500189 + ... + 500588.

Almost surely, 2^200155400 is an apocalyptic number.

200155400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200155400 is an abundant number, since it is smaller than the sum of its proper divisors (265206370).

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

200155400 is a wasteful number, since it uses less digits than its factorization.

200155400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000793 (or 1000784 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 200155400 is about 14147.6287765830. The cubic root of 200155400 is about 584.9549725491.

The spelling of 200155400 in words is "two hundred million, one hundred fifty-five thousand, four hundred".