55365420 has 96 divisors (see below), whose sum is σ = 170553600. Its totient is φ = 13308160.

The previous prime is 55365397. The next prime is 55365421. The reversal of 55365420 is 2456355.

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

It is not an unprimeable number, because it can be changed into a prime (55365421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98059 + ... + 98621.

It is an arithmetic number, because the mean of its divisors is an integer number (1776600).

Almost surely, 2^55365420 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 55365420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85276800).

55365420 is an abundant number, since it is smaller than the sum of its proper divisors (115188180).

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

55365420 is a wasteful number, since it uses less digits than its factorization.

55365420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735 (or 733 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 30.

The square root of 55365420 is about 7440.7943124373. The cubic root of 55365420 is about 381.1356148831.

The spelling of 55365420 in words is "fifty-five million, three hundred sixty-five thousand, four hundred twenty".