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38472031 = 1323128669
BaseRepresentation
bin1001001011000…
…0100101011111
32200101120201001
42102300211133
534322101111
63452331131
7645002233
oct222604537
980346631
1038472031
111a797674
1210a73aa7
137c80220
1451765c3
15359e1c1
hex24b095f

38472031 has 8 divisors (see below), whose sum is σ = 43233120. Its totient is φ = 33968352.

The previous prime is 38472013. The next prime is 38472047. The reversal of 38472031 is 13027483.

38472031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 38472031 - 25 = 38471999 is a prime.

It is a super-2 number, since 2×384720312 = 2960194338529922, 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 (38472001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64036 + ... + 64633.

It is an arithmetic number, because the mean of its divisors is an integer number (5404140).

Almost surely, 238472031 is an apocalyptic number.

38472031 is a deficient number, since it is larger than the sum of its proper divisors (4761089).

38472031 is a wasteful number, since it uses less digits than its factorization.

38472031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128705.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 38472031 is about 6202.5826072693. The cubic root of 38472031 is about 337.5838833106.

The spelling of 38472031 in words is "thirty-eight million, four hundred seventy-two thousand, thirty-one".

Divisors: 1 13 23 299 128669 1672697 2959387 38472031