55385786 has 4 divisors (see below), whose sum is σ = 83078682. Its totient is φ = 27692892.

The previous prime is 55385783. The next prime is 55385831. The reversal of 55385786 is 68758355.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 38204761 + 17181025 = 6181^2 + 4145^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 55385786.

It is not an unprimeable number, because it can be changed into a prime (55385783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13846445 + ... + 13846448.

Almost surely, 2^55385786 is an apocalyptic number.

55385786 is a deficient number, since it is larger than the sum of its proper divisors (27692896).

55385786 is a wasteful number, since it uses less digits than its factorization.

55385786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27692895.

The product of its digits is 1008000, while the sum is 47.

The square root of 55385786 is about 7442.1627232949. The cubic root of 55385786 is about 381.1823423432.

The spelling of 55385786 in words is "fifty-five million, three hundred eighty-five thousand, seven hundred eighty-six".