55393380 has 72 divisors (see below), whose sum is σ = 192034752. Its totient is φ = 12661056.

The previous prime is 55393369. The next prime is 55393409. The reversal of 55393380 is 8339355.

55393380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20722 + ... + 23241.

Almost surely, 2^55393380 is an apocalyptic number.

It is an amenable number.

55393380 is an abundant number, since it is smaller than the sum of its proper divisors (136641372).

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

55393380 is a wasteful number, since it uses less digits than its factorization.

55393380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43985 (or 43980 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 36.

The square root of 55393380 is about 7442.6729069602. The cubic root of 55393380 is about 381.1997629766.

The spelling of 55393380 in words is "fifty-five million, three hundred ninety-three thousand, three hundred eighty".