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38130069 = 312710023
BaseRepresentation
bin1001000101110…
…1000110010101
32122202012121210
42101131012111
534230130234
63441132033
7642046245
oct221350625
978665553
1038130069
111a58375a
121092a019
137b90693
1450c7b25
153532be9
hex245d195

38130069 has 4 divisors (see below), whose sum is σ = 50840096. Its totient is φ = 25420044.

The previous prime is 38130023. The next prime is 38130073. The reversal of 38130069 is 96003183.

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: 96003183 = 332001061.

It is not a de Polignac number, because 38130069 - 28 = 38129813 is a prime.

It is a super-3 number, since 3×381300693 (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38130089) 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, 6355009 + ... + 6355014.

It is an arithmetic number, because the mean of its divisors is an integer number (12710024).

Almost surely, 238130069 is an apocalyptic number.

It is an amenable number.

38130069 is a deficient number, since it is larger than the sum of its proper divisors (12710027).

38130069 is a wasteful number, since it uses less digits than its factorization.

38130069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12710026.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 38130069 is about 6174.9549795930. The cubic root of 38130069 is about 336.5806905031.

The spelling of 38130069 in words is "thirty-eight million, one hundred thirty thousand, sixty-nine".

Divisors: 1 3 12710023 38130069