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30381741 = 32131979173
BaseRepresentation
bin111001111100…
…1011010101101
32010011112220200
41303321122231
530234203431
63003104113
7516145335
oct163713255
963145820
1030381741
1116171285
12a212039
1363a9980
14406c0c5
152a01ee6
hex1cf96ad

30381741 has 48 divisors (see below), whose sum is σ = 50668800. Its totient is φ = 17387136.

The previous prime is 30381739. The next prime is 30381749. The reversal of 30381741 is 14718303.

It is not a de Polignac number, because 30381741 - 21 = 30381739 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30381749) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 175531 + ... + 175703.

It is an arithmetic number, because the mean of its divisors is an integer number (1055600).

Almost surely, 230381741 is an apocalyptic number.

It is an amenable number.

30381741 is a deficient number, since it is larger than the sum of its proper divisors (20287059).

30381741 is a wasteful number, since it uses less digits than its factorization.

30381741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290 (or 287 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 30381741 is about 5511.9634432750. The cubic root of 30381741 is about 312.0356529770.

The spelling of 30381741 in words is "thirty million, three hundred eighty-one thousand, seven hundred forty-one".

Divisors: 1 3 9 13 19 39 57 79 117 171 173 237 247 519 711 741 1027 1501 1557 2223 2249 3081 3287 4503 6747 9243 9861 13509 13667 19513 20241 29583 41001 42731 58539 123003 128193 175617 177671 259673 384579 533013 779019 1599039 2337057 3375749 10127247 30381741