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30838741 = 47516491
BaseRepresentation
bin111010110100…
…0111111010101
32011000202210121
41311220333111
530343314431
63020551541
7523060603
oct165507725
964022717
1030838741
111645366a
12a3b25b1
13650999b
14414a873
152a92611
hex1d68fd5

30838741 has 4 divisors (see below), whose sum is σ = 30849984. Its totient is φ = 30827500.

The previous prime is 30838727. The next prime is 30838747. The reversal of 30838741 is 14783803.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 14783803 = 47314549.

It is a cyclic number.

It is not a de Polignac number, because 30838741 - 211 = 30836693 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30838697 and 30838706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30838747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1506 + ... + 7996.

It is an arithmetic number, because the mean of its divisors is an integer number (7712496).

Almost surely, 230838741 is an apocalyptic number.

It is an amenable number.

30838741 is a deficient number, since it is larger than the sum of its proper divisors (11243).

30838741 is an equidigital number, since it uses as much as digits as its factorization.

30838741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11242.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 30838741 is about 5553.2639951654. The cubic root of 30838741 is about 313.5924127271.

The spelling of 30838741 in words is "thirty million, eight hundred thirty-eight thousand, seven hundred forty-one".

Divisors: 1 4751 6491 30838741