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65430638 = 2713359509
BaseRepresentation
bin1111100110011…
…0010001101110
311120010012221222
43321212101232
5113222240023
610254223342
71423102610
oct371462156
9146105858
1065430638
1133a30009
1219ab4b52
131072ba70
148992db0
155b26cc8
hex3e6646e

65430638 has 16 divisors (see below), whose sum is σ = 120795360. Its totient is φ = 25884576.

The previous prime is 65430619. The next prime is 65430691. The reversal of 65430638 is 83603456.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 65430598 and 65430607.

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, 179573 + ... + 179936.

It is an arithmetic number, because the mean of its divisors is an integer number (7549710).

Almost surely, 265430638 is an apocalyptic number.

65430638 is a deficient number, since it is larger than the sum of its proper divisors (55364722).

65430638 is a wasteful number, since it uses less digits than its factorization.

65430638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359531.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 65430638 is about 8088.9206943819. The cubic root of 65430638 is about 402.9585592010.

The spelling of 65430638 in words is "sixty-five million, four hundred thirty thousand, six hundred thirty-eight".

Divisors: 1 2 7 13 14 26 91 182 359509 719018 2516563 4673617 5033126 9347234 32715319 65430638