55273680 has 240 divisors, whose sum is σ = 231663744. Its totient is φ = 11473920.

The previous prime is 55273663. The next prime is 55273709. The reversal of 55273680 is 8637255.

It is a tau number, because it is divible by the number of its divisors (240).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 54942 + ... + 55938.

Almost surely, 2^55273680 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 55273680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115831872).

55273680 is an abundant number, since it is smaller than the sum of its proper divisors (176390064).

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

55273680 is a wasteful number, since it uses less digits than its factorization.

55273680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034 (or 1025 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 55273680 is about 7434.6270921950. The cubic root of 55273680 is about 380.9249857482.

The spelling of 55273680 in words is "fifty-five million, two hundred seventy-three thousand, six hundred eighty".