55778860 has 24 divisors (see below), whose sum is σ = 119994336. Its totient is φ = 21767040.

The previous prime is 55778837. The next prime is 55778867. The reversal of 55778860 is 6887755.

55778860 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×55778860² = 6222562445799200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55778860.

It is not an unprimeable number, because it can be changed into a prime (55778867) 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 7 ways as a sum of consecutive naturals, for example, 33192 + ... + 34831.

It is an arithmetic number, because the mean of its divisors is an integer number (4999764).

Almost surely, 2^55778860 is an apocalyptic number.

It is an amenable number.

55778860 is an abundant number, since it is smaller than the sum of its proper divisors (64215476).

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

55778860 is a wasteful number, since it uses less digits than its factorization.

55778860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68073 (or 68071 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 46.

The square root of 55778860 is about 7468.5246200304. The cubic root of 55778860 is about 382.0819702935.

The spelling of 55778860 in words is "fifty-five million, seven hundred seventy-eight thousand, eight hundred sixty".