55000878 has 16 divisors (see below), whose sum is σ = 113795280. Its totient is φ = 17701376.

The previous prime is 55000871. The next prime is 55000937. The reversal of 55000878 is 87800055.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55000871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157875 + ... + 158222.

It is an arithmetic number, because the mean of its divisors is an integer number (7112205).

Almost surely, 2^55000878 is an apocalyptic number.

55000878 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

55000878 is an abundant number, since it is smaller than the sum of its proper divisors (58794402).

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

55000878 is a wasteful number, since it uses less digits than its factorization.

55000878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316131.

The product of its (nonzero) digits is 11200, while the sum is 33.

The square root of 55000878 is about 7416.2576816073. The cubic root of 55000878 is about 380.2972696970.

The spelling of 55000878 in words is "fifty-five million, eight hundred seventy-eight", and thus it is an aban number.