55309378 has 8 divisors (see below), whose sum is σ = 82995660. Its totient is φ = 27644160.

The previous prime is 55309367. The next prime is 55309391. The reversal of 55309378 is 87390355.

It is a happy number.

55309378 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 54420129 + 889249 = 7377^2 + 943^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 55309378.

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 3 ways as a sum of consecutive naturals, for example, 7258 + ... + 12778.

Almost surely, 2^55309378 is an apocalyptic number.

55309378 is a deficient number, since it is larger than the sum of its proper divisors (27686282).

55309378 is a wasteful number, since it uses less digits than its factorization.

55309378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10532.

The product of its (nonzero) digits is 113400, while the sum is 40.

The square root of 55309378 is about 7437.0274975961. The cubic root of 55309378 is about 381.0069737382.

The spelling of 55309378 in words is "fifty-five million, three hundred nine thousand, three hundred seventy-eight".