55438200 has 144 divisors (see below), whose sum is σ = 196099800. Its totient is φ = 13996800.

The previous prime is 55438183. The next prime is 55438217. The reversal of 55438200 is 283455.

It is an interprime number because it is at equal distance from previous prime (55438183) and next prime (55438217).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 33390 + ... + 35010.

Almost surely, 2^55438200 is an apocalyptic number.

55438200 is a gapful number since it is divisible by the number (50) 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 55438200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98049900).

55438200 is an abundant number, since it is smaller than the sum of its proper divisors (140661600).

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

55438200 is a wasteful number, since it uses less digits than its factorization.

55438200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1662 (or 1650 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 55438200 is about 7445.6833131688. The cubic root of 55438200 is about 381.3025476258.

The spelling of 55438200 in words is "fifty-five million, four hundred thirty-eight thousand, two hundred".