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52891540 = 22513203429
BaseRepresentation
bin1100100111000…
…0111110010100
310200112011112221
43021300332110
5102020012130
65125352124
71211366512
oct311607624
9120464487
1052891540
1127946219
1215868644
13ac5b590
14704b4b2
15499b87a
hex3270f94

52891540 has 24 divisors (see below), whose sum is σ = 119616840. Its totient is φ = 19529088.

The previous prime is 52891511. The next prime is 52891583. The reversal of 52891540 is 4519825.

52891540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2396304 + 50495236 = 1548^2 + 7106^2 .

It is a junction number, because it is equal to n+sod(n) for n = 52891496 and 52891505.

It is a congruent number.

It is an unprimeable number.

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, 101455 + ... + 101974.

It is an arithmetic number, because the mean of its divisors is an integer number (4984035).

Almost surely, 252891540 is an apocalyptic number.

It is an amenable number.

52891540 is an abundant number, since it is smaller than the sum of its proper divisors (66725300).

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

52891540 is a wasteful number, since it uses less digits than its factorization.

52891540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203451 (or 203449 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 52891540 is about 7272.6570110242. The cubic root of 52891540 is about 375.3721697762.

The spelling of 52891540 in words is "fifty-two million, eight hundred ninety-one thousand, five hundred forty".

Divisors: 1 2 4 5 10 13 20 26 52 65 130 260 203429 406858 813716 1017145 2034290 2644577 4068580 5289154 10578308 13222885 26445770 52891540