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380881013 = 3701102913
BaseRepresentation
bin10110101100111…
…100100001110101
3222112200202112012
4112230330201311
51240001143023
6101443334005
712303302162
oct2654744165
9875622465
10380881013
11185aa75a7
12a7681305
1360ba91a6
1438829069
1523688978
hex16b3c875

380881013 has 4 divisors (see below), whose sum is σ = 380987628. Its totient is φ = 380774400.

The previous prime is 380881003. The next prime is 380881027. The reversal of 380881013 is 310188083.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 310188083 = 417565563.

It can be written as a sum of positive squares in 2 ways, for example, as 83594449 + 297286564 = 9143^2 + 17242^2 .

It is a cyclic number.

It is not a de Polignac number, because 380881013 - 212 = 380876917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (380881003) 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, 47756 + ... + 55157.

It is an arithmetic number, because the mean of its divisors is an integer number (95246907).

Almost surely, 2380881013 is an apocalyptic number.

It is an amenable number.

380881013 is a deficient number, since it is larger than the sum of its proper divisors (106615).

380881013 is a wasteful number, since it uses less digits than its factorization.

380881013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106614.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 380881013 is about 19516.1731135999. The cubic root of 380881013 is about 724.8749767768.

The spelling of 380881013 in words is "three hundred eighty million, eight hundred eighty-one thousand, thirteen".

Divisors: 1 3701 102913 380881013