Search a number
-
+
30800026 = 2191994073
BaseRepresentation
bin111010101111…
…1100010011010
32010221210200201
41311133202122
530341100101
63020052414
7522536665
oct165374232
963853621
1030800026
1116427574
12a39410a
1364c518a
14413a6dc
152a85e01
hex1d5f89a

30800026 has 16 divisors (see below), whose sum is σ = 48888000. Its totient is φ = 14512608.

The previous prime is 30800017. The next prime is 30800027. The reversal of 30800026 is 62000803.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a junction number, because it is equal to n+sod(n) for n = 30799976 and 30800012.

It is not an unprimeable number, because it can be changed into a prime (30800027) 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, 5526 + ... + 9598.

It is an arithmetic number, because the mean of its divisors is an integer number (3055500).

Almost surely, 230800026 is an apocalyptic number.

30800026 is a deficient number, since it is larger than the sum of its proper divisors (18087974).

30800026 is a wasteful number, since it uses less digits than its factorization.

30800026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4293.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 30800026 is about 5549.7771126416. Note that the first 3 decimals coincide. The cubic root of 30800026 is about 313.4611296514.

Adding to 30800026 its reverse (62000803), we get a palindrome (92800829).

The spelling of 30800026 in words is "thirty million, eight hundred thousand, twenty-six".

Divisors: 1 2 19 38 199 398 3781 4073 7562 8146 77387 154774 810527 1621054 15400013 30800026