55439300 has 72 divisors (see below), whose sum is σ = 142282560. Its totient is φ = 18345600.

The previous prime is 55439299. The next prime is 55439309. The reversal of 55439300 is 393455.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (55439309) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18935 + ... + 21665.

Almost surely, 2^55439300 is an apocalyptic number.

55439300 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 55439300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71141280).

55439300 is an abundant number, since it is smaller than the sum of its proper divisors (86843260).

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

55439300 is a wasteful number, since it uses less digits than its factorization.

55439300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2781 (or 2774 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 29.

The square root of 55439300 is about 7445.7571811066. The cubic root of 55439300 is about 381.3050695332.

The spelling of 55439300 in words is "fifty-five million, four hundred thirty-nine thousand, three hundred".