55428480 has 96 divisors (see below), whose sum is σ = 191421360. Its totient is φ = 14779392.

The previous prime is 55428473. The next prime is 55428481. The reversal of 55428480 is 8482455.

55428480 is a `hidden beast` number, since 554 + 28 + 4 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×55428480² = 6144632790220800, which contains 22 as substring.

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 (55428481) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 949 + ... + 10571.

Almost surely, 2^55428480 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 55428480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95710680).

55428480 is an abundant number, since it is smaller than the sum of its proper divisors (135992880).

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

55428480 is a wasteful number, since it uses less digits than its factorization.

55428480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9648 (or 9633 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 36.

The square root of 55428480 is about 7445.0305573584. The cubic root of 55428480 is about 381.2802616846.

The spelling of 55428480 in words is "fifty-five million, four hundred twenty-eight thousand, four hundred eighty".