Search a number
-
+
55577788 = 2271984921
BaseRepresentation
bin1101010000000…
…0110010111100
310212120122101121
43110000302330
5103211442123
65303120324
71243255240
oct324006274
9125518347
1055577788
1129410462
12167430a4
13b68c186
14754a420
154d2c75d
hex3500cbc

55577788 has 12 divisors (see below), whose sum is σ = 111155632. Its totient is φ = 23819040.

The previous prime is 55577719. The next prime is 55577789. The reversal of 55577788 is 88777555.

It can be divided in two parts, 5557778 and 8, that multiplied together give a square (44462224 = 66682).

55577788 is an admirable number.

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55577789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 992433 + ... + 992488.

Almost surely, 255577788 is an apocalyptic number.

It is an amenable number.

55577788 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

55577788 is a wasteful number, since it uses less digits than its factorization.

55577788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1984932 (or 1984930 counting only the distinct ones).

The product of its digits is 2744000, while the sum is 52.

The square root of 55577788 is about 7455.0511735333. The cubic root of 55577788 is about 381.6223069878.

The spelling of 55577788 in words is "fifty-five million, five hundred seventy-seven thousand, seven hundred eighty-eight".

Divisors: 1 2 4 7 14 28 1984921 3969842 7939684 13894447 27788894 55577788