Search a number
-
+
57442220 = 22511261101
BaseRepresentation
bin1101101100011…
…1111110101100
311000002100220122
43123013332230
5104201122340
65411104112
71265152013
oct333077654
9130070818
1057442220
112a474210
12172a2038
13bb929a4
1478b3a7a
155099db5
hex36c7fac

57442220 has 24 divisors (see below), whose sum is σ = 131595408. Its totient is φ = 20888000.

The previous prime is 57442219. The next prime is 57442261. The reversal of 57442220 is 2224475.

It is a self number, because there is not a number n which added to its sum of digits gives 57442220.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130331 + ... + 130770.

It is an arithmetic number, because the mean of its divisors is an integer number (5483142).

Almost surely, 257442220 is an apocalyptic number.

It is an amenable number.

57442220 is an abundant number, since it is smaller than the sum of its proper divisors (74153188).

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

57442220 is a wasteful number, since it uses less digits than its factorization.

57442220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261121 (or 261119 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 26.

The square root of 57442220 is about 7579.0645860818. The cubic root of 57442220 is about 385.8428042568.

Adding to 57442220 its reverse (2224475), we get a palindrome (59666695).

The spelling of 57442220 in words is "fifty-seven million, four hundred forty-two thousand, two hundred twenty".

Divisors: 1 2 4 5 10 11 20 22 44 55 110 220 261101 522202 1044404 1305505 2611010 2872111 5222020 5744222 11488444 14360555 28721110 57442220