155438200 has 24 divisors (see below), whose sum is σ = 361394280. Its totient is φ = 62175200.

The previous prime is 155438197. The next prime is 155438201. The reversal of 155438200 is 2834551.

It is a super-2 number, since 2×155438200² = 48322068038480000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155438201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 388396 + ... + 388795.

It is an arithmetic number, because the mean of its divisors is an integer number (15058095).

Almost surely, 2^155438200 is an apocalyptic number.

155438200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155438200 is an abundant number, since it is smaller than the sum of its proper divisors (205956080).

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

155438200 is a wasteful number, since it uses less digits than its factorization.

155438200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777207 (or 777198 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 155438200 is about 12467.4857128452. The cubic root of 155438200 is about 537.6742683529.

The spelling of 155438200 in words is "one hundred fifty-five million, four hundred thirty-eight thousand, two hundred".