55678440 has 32 divisors (see below), whose sum is σ = 167035680. Its totient is φ = 14847552.

The previous prime is 55678439. The next prime is 55678453. The reversal of 55678440 is 4487655.

55678440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 7 ways as a sum of consecutive naturals, for example, 231874 + ... + 232113.

It is an arithmetic number, because the mean of its divisors is an integer number (5219865).

Almost surely, 2^55678440 is an apocalyptic number.

It is an amenable number.

55678440 is an abundant number, since it is smaller than the sum of its proper divisors (111357240).

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

55678440 is a wasteful number, since it uses less digits than its factorization.

55678440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464001 (or 463997 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 39.

The square root of 55678440 is about 7461.7987107667. The cubic root of 55678440 is about 381.8525421562.

The spelling of 55678440 in words is "fifty-five million, six hundred seventy-eight thousand, four hundred forty".