55473380 has 48 divisors (see below), whose sum is σ = 124041456. Its totient is φ = 20766720.

The previous prime is 55473359. The next prime is 55473403. The reversal of 55473380 is 8337455.

It can be written as a sum of positive squares in 8 ways, for example, as 15808576 + 39664804 = 3976^2 + 6298^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 55473380.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81602 + ... + 82278.

It is an arithmetic number, because the mean of its divisors is an integer number (2584197).

Almost surely, 2^55473380 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 55473380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62020728).

55473380 is an abundant number, since it is smaller than the sum of its proper divisors (68568076).

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

55473380 is a wasteful number, since it uses less digits than its factorization.

55473380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944 (or 942 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 55473380 is about 7448.0453811722. The cubic root of 55473380 is about 381.3831862899.

The spelling of 55473380 in words is "fifty-five million, four hundred seventy-three thousand, three hundred eighty".