55639300 has 72 divisors (see below), whose sum is σ = 133491456. Its totient is φ = 20021760.

The previous prime is 55639253. The next prime is 55639303. The reversal of 55639300 is 393655.

It is not an unprimeable number, because it can be changed into a prime (55639303) 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, 38389 + ... + 39811.

It is an arithmetic number, because the mean of its divisors is an integer number (1854048).

Almost surely, 2^55639300 is an apocalyptic number.

55639300 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 55639300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66745728).

55639300 is an abundant number, since it is smaller than the sum of its proper divisors (77852156).

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

55639300 is a wasteful number, since it uses less digits than its factorization.

55639300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1477 (or 1470 counting only the distinct ones).

The product of its (nonzero) digits is 12150, while the sum is 31.

The square root of 55639300 is about 7459.1755576605. The cubic root of 55639300 is about 381.7630448452.

The spelling of 55639300 in words is "fifty-five million, six hundred thirty-nine thousand, three hundred".