55747770 has 64 divisors (see below), whose sum is σ = 144958464. Its totient is φ = 13639680.

The previous prime is 55747753. The next prime is 55747771. The reversal of 55747770 is 7774755.

It is a happy number.

55747770 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (55747771) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 86650 + ... + 87290.

It is an arithmetic number, because the mean of its divisors is an integer number (2264976).

Almost surely, 2^55747770 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55747770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72479232).

55747770 is an abundant number, since it is smaller than the sum of its proper divisors (89210694).

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

55747770 is a wasteful number, since it uses less digits than its factorization.

55747770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887.

The product of its (nonzero) digits is 240100, while the sum is 42.

The square root of 55747770 is about 7466.4429281955. The cubic root of 55747770 is about 382.0109688653.

The spelling of 55747770 in words is "fifty-five million, seven hundred forty-seven thousand, seven hundred seventy".