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78580213 = 236750993
BaseRepresentation
bin1001010111100…
…00100111110101
312110212021210021
410223300213311
5130104031323
611444125141
71642630555
oct453604765
9173767707
1078580213
11403a1528
12223967b1
131338408a
14a617165
156d7305d
hex4af09f5

78580213 has 8 divisors (see below), whose sum is σ = 83222208. Its totient is φ = 74040384.

The previous prime is 78580211. The next prime is 78580241. The reversal of 78580213 is 31208587.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78580213 - 21 = 78580211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78580211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23956 + ... + 27037.

It is an arithmetic number, because the mean of its divisors is an integer number (10402776).

Almost surely, 278580213 is an apocalyptic number.

It is an amenable number.

78580213 is a deficient number, since it is larger than the sum of its proper divisors (4641995).

78580213 is a wasteful number, since it uses less digits than its factorization.

78580213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51083.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 78580213 is about 8864.5480990291. The cubic root of 78580213 is about 428.3226760644.

The spelling of 78580213 in words is "seventy-eight million, five hundred eighty thousand, two hundred thirteen".

Divisors: 1 23 67 1541 50993 1172839 3416531 78580213