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830404015 = 57171917307
BaseRepresentation
bin110001011111101…
…111010110101111
32010212112220011021
4301133233112233
53200040412030
6214222235011
726402213650
oct6137572657
92125486137
10830404015
11396817911
121b2125a67
13103069a2c
147c401527
154cd8097a
hex317ef5af

830404015 has 32 divisors (see below), whose sum is σ = 1212309504. Its totient is φ = 533045760.

The previous prime is 830403971. The next prime is 830404021. The reversal of 830404015 is 510404038.

It is not a de Polignac number, because 830404015 - 213 = 830395823 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109992 + ... + 117298.

It is an arithmetic number, because the mean of its divisors is an integer number (37884672).

Almost surely, 2830404015 is an apocalyptic number.

830404015 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

830404015 is a deficient number, since it is larger than the sum of its proper divisors (381905489).

830404015 is a wasteful number, since it uses less digits than its factorization.

830404015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7527.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 830404015 is about 28816.7315113980. The cubic root of 830404015 is about 939.9320967247.

The spelling of 830404015 in words is "eight hundred thirty million, four hundred four thousand, fifteen".

Divisors: 1 5 7 17 35 85 119 191 595 955 1337 3247 6685 7307 16235 22729 36535 51149 113645 124219 255745 621095 869533 1395637 4347665 6978185 9769459 23725829 48847295 118629145 166080803 830404015