55443960 has 256 divisors, whose sum is σ = 217728000. Its totient is φ = 12372480.

The previous prime is 55443959. The next prime is 55443967. The reversal of 55443960 is 6934455.

It is a happy number.

55443960 is a `hidden beast` number, since 554 + 43 + 9 + 60 = 666.

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 (55443967) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 154261 + ... + 154619.

It is an arithmetic number, because the mean of its divisors is an integer number (850500).

Almost surely, 2^55443960 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 55443960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108864000).

55443960 is an abundant number, since it is smaller than the sum of its proper divisors (162284040).

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

55443960 is a wasteful number, since it uses less digits than its factorization.

55443960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403 (or 393 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 55443960 is about 7446.0701044242. The cubic root of 55443960 is about 381.3157528803.

The spelling of 55443960 in words is "fifty-five million, four hundred forty-three thousand, nine hundred sixty".