55747790 has 32 divisors (see below), whose sum is σ = 117028800. Its totient is φ = 19112352.

The previous prime is 55747787. The next prime is 55747799. The reversal of 55747790 is 9774755.

55747790 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55747799) 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 15 ways as a sum of consecutive naturals, for example, 4697 + ... + 11556.

It is an arithmetic number, because the mean of its divisors is an integer number (3657150).

Almost surely, 2^55747790 is an apocalyptic number.

55747790 is an abundant number, since it is smaller than the sum of its proper divisors (61281010).

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

55747790 is a wasteful number, since it uses less digits than its factorization.

55747790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16281 (or 16267 counting only the distinct ones).

The product of its (nonzero) digits is 308700, while the sum is 44.

The square root of 55747790 is about 7466.4442675212. Note that the first 3 decimals coincide. The cubic root of 55747790 is about 382.0110145486.

The spelling of 55747790 in words is "fifty-five million, seven hundred forty-seven thousand, seven hundred ninety".