55433280 has 224 divisors, whose sum is σ = 205703424. Its totient is φ = 12386304.

The previous prime is 55433227. The next prime is 55433303. The reversal of 55433280 is 8233455.

It is a tau number, because it is divible by the number of its divisors (224).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 490504 + ... + 490616.

Almost surely, 2^55433280 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 55433280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102851712).

55433280 is an abundant number, since it is smaller than the sum of its proper divisors (150270144).

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

55433280 is a wasteful number, since it uses less digits than its factorization.

55433280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213 (or 203 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 55433280 is about 7445.3529130593. The cubic root of 55433280 is about 381.2912674133.

The spelling of 55433280 in words is "fifty-five million, four hundred thirty-three thousand, two hundred eighty".