55130868 has 72 divisors (see below), whose sum is σ = 155672608. Its totient is φ = 16959456.

The previous prime is 55130863. The next prime is 55130893. The reversal of 55130868 is 86803155.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55130863) 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, 10455 + ... + 14817.

Almost surely, 2^55130868 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55130868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77836304).

55130868 is an abundant number, since it is smaller than the sum of its proper divisors (100541740).

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

55130868 is a wasteful number, since it uses less digits than its factorization.

55130868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4395 (or 4381 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 55130868 is about 7425.0163636183. The cubic root of 55130868 is about 380.5966343005.

The spelling of 55130868 in words is "fifty-five million, one hundred thirty thousand, eight hundred sixty-eight".