55042680 has 384 divisors, whose sum is σ = 224570880. Its totient is φ = 10644480.

The previous prime is 55042661. The next prime is 55042721. The reversal of 55042680 is 8624055.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1487622 + ... + 1487658.

It is an arithmetic number, because the mean of its divisors is an integer number (584820).

Almost surely, 2^55042680 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 55042680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112285440).

55042680 is an abundant number, since it is smaller than the sum of its proper divisors (169528200).

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

55042680 is a wasteful number, since it uses less digits than its factorization.

55042680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 55042680 is about 7419.0754140931. The cubic root of 55042680 is about 380.3935903458.

The spelling of 55042680 in words is "fifty-five million, forty-two thousand, six hundred eighty".