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30688301 = 74384043
BaseRepresentation
bin111010100010…
…0010000101101
32010202010102202
41311010100231
530324011201
63013431245
7521563160
oct165042055
963663382
1030688301
1116360636
12a33b525
136486377
14410bad7
152a62c6b
hex1d4442d

30688301 has 4 divisors (see below), whose sum is σ = 35072352. Its totient is φ = 26304252.

The previous prime is 30688289. The next prime is 30688303. The reversal of 30688301 is 10388603.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10388603 = 97107099.

It is a cyclic number.

It is not a de Polignac number, because 30688301 - 222 = 26493997 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30688303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2192015 + ... + 2192028.

It is an arithmetic number, because the mean of its divisors is an integer number (8768088).

Almost surely, 230688301 is an apocalyptic number.

It is an amenable number.

30688301 is a deficient number, since it is larger than the sum of its proper divisors (4384051).

30688301 is an equidigital number, since it uses as much as digits as its factorization.

30688301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4384050.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 30688301 is about 5539.7022483162. The cubic root of 30688301 is about 313.0816507919.

The spelling of 30688301 in words is "thirty million, six hundred eighty-eight thousand, three hundred one".

Divisors: 1 7 4384043 30688301