55693920 has 96 divisors (see below), whose sum is σ = 181530720. Its totient is φ = 14336000.

The previous prime is 55693907. The next prime is 55693927. The reversal of 55693920 is 2939655.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55693927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11920 + ... + 15920.

It is an arithmetic number, because the mean of its divisors is an integer number (1890945).

Almost surely, 2^55693920 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 55693920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90765360).

55693920 is an abundant number, since it is smaller than the sum of its proper divisors (125836800).

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

55693920 is a wasteful number, since it uses less digits than its factorization.

55693920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4048 (or 4040 counting only the distinct ones).

The product of its (nonzero) digits is 72900, while the sum is 39.

The square root of 55693920 is about 7462.8359220875. The cubic root of 55693920 is about 381.8879270654.

The spelling of 55693920 in words is "fifty-five million, six hundred ninety-three thousand, nine hundred twenty".