55623760 has 20 divisors (see below), whose sum is σ = 129325428. Its totient is φ = 22249472.

The previous prime is 55623749. The next prime is 55623761. The reversal of 55623760 is 6732655.

It can be written as a sum of positive squares in 2 ways, for example, as 12222016 + 43401744 = 3496^2 + 6588^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55623761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 347569 + ... + 347728.

Almost surely, 2^55623760 is an apocalyptic number.

It is an amenable number.

55623760 is an abundant number, since it is smaller than the sum of its proper divisors (73701668).

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

55623760 is a wasteful number, since it uses less digits than its factorization.

55623760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695310 (or 695304 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 34.

The square root of 55623760 is about 7458.1338148360. The cubic root of 55623760 is about 381.7274995255.

The spelling of 55623760 in words is "fifty-five million, six hundred twenty-three thousand, seven hundred sixty".