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30795389 = 239269479
BaseRepresentation
bin111010101111…
…0011001111101
32010221120022222
41311132121331
530340423024
63020015125
7522520322
oct165363175
963846288
1030795389
1116424039
12a3914a5
1364c3031
144138b49
152a8485e
hex1d5e67d

30795389 has 8 divisors (see below), whose sum is σ = 31104000. Its totient is φ = 30488752.

The previous prime is 30795383. The next prime is 30795403. The reversal of 30795389 is 98359703.

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

It is a de Polignac number, because none of the positive numbers 2k-30795389 is a prime.

It is a super-2 number, since 2×307953892 = 1896711967322642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30795383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64052 + ... + 64530.

It is an arithmetic number, because the mean of its divisors is an integer number (3888000).

Almost surely, 230795389 is an apocalyptic number.

It is an amenable number.

30795389 is a deficient number, since it is larger than the sum of its proper divisors (308611).

30795389 is a wasteful number, since it uses less digits than its factorization.

30795389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 987.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 30795389 is about 5549.3593323914. The cubic root of 30795389 is about 313.4453981473.

The spelling of 30795389 in words is "thirty million, seven hundred ninety-five thousand, three hundred eighty-nine".

Divisors: 1 239 269 479 64291 114481 128851 30795389