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55640120 = 2354912833
BaseRepresentation
bin1101010001000…
…0000000111000
310212200210220012
43110100000320
5103220440440
65304321052
71243635044
oct324200070
9125623805
1055640120
1129453278
1216773188
13b6b1663
147565024
154d40e65
hex3510038

55640120 has 32 divisors (see below), whose sum is σ = 125489520. Its totient is φ = 22202880.

The previous prime is 55640111. The next prime is 55640131. The reversal of 55640120 is 2104655.

It is a super-2 number, since 2×556401202 = 6191645907228800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18224 + ... + 21056.

Almost surely, 255640120 is an apocalyptic number.

It is an amenable number.

55640120 is an abundant number, since it is smaller than the sum of its proper divisors (69849400).

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

55640120 is a wasteful number, since it uses less digits than its factorization.

55640120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3335 (or 3331 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 55640120 is about 7459.2305233181. The cubic root of 55640120 is about 381.7649202832.

Adding to 55640120 its reverse (2104655), we get a palindrome (57744775).

The spelling of 55640120 in words is "fifty-five million, six hundred forty thousand, one hundred twenty".

Divisors: 1 2 4 5 8 10 20 40 491 982 1964 2455 2833 3928 4910 5666 9820 11332 14165 19640 22664 28330 56660 113320 1391003 2782006 5564012 6955015 11128024 13910030 27820060 55640120