55644320 has 48 divisors (see below), whose sum is σ = 131920488. Its totient is φ = 22179840.

The previous prime is 55644319. The next prime is 55644343. The reversal of 55644320 is 2344655.

It can be written as a sum of positive squares in 4 ways, for example, as 36529936 + 19114384 = 6044^2 + 4372^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72740 + ... + 73500.

Almost surely, 2^55644320 is an apocalyptic number.

It is an amenable number.

55644320 is an abundant number, since it is smaller than the sum of its proper divisors (76276168).

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

55644320 is a wasteful number, since it uses less digits than its factorization.

55644320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233 (or 1225 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 55644320 is about 7459.5120483849. The cubic root of 55644320 is about 381.7745258958.

Adding to 55644320 its reverse (2344655), we get a palindrome (57988975).

The spelling of 55644320 in words is "fifty-five million, six hundred forty-four thousand, three hundred twenty".