55128300 has 36 divisors (see below), whose sum is σ = 159505416. Its totient is φ = 14700800.

The previous prime is 55128289. The next prime is 55128317. The reversal of 55128300 is 382155.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91581 + ... + 92180.

It is an arithmetic number, because the mean of its divisors is an integer number (4430706).

Almost surely, 2^55128300 is an apocalyptic number.

55128300 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55128300 is an abundant number, since it is smaller than the sum of its proper divisors (104377116).

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

55128300 is a wasteful number, since it uses less digits than its factorization.

55128300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183778 (or 183771 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 55128300 is about 7424.8434326927. The cubic root of 55128300 is about 380.5907248021.

The spelling of 55128300 in words is "fifty-five million, one hundred twenty-eight thousand, three hundred".