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230820878 = 2115410439
BaseRepresentation
bin11011100001000…
…00110000001110
3121002022220201102
431300200300032
5433042232003
634523143102
75501642111
oct1560406016
9532286642
10230820878
11109324162
1265374a92
1338a88b02
1422926578
15153e6588
hexdc20c0e

230820878 has 4 divisors (see below), whose sum is σ = 346231320. Its totient is φ = 115410438.

The previous prime is 230820871. The next prime is 230820881. The reversal of 230820878 is 878028032.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230820871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57705218 + ... + 57705221.

It is an arithmetic number, because the mean of its divisors is an integer number (86557830).

Almost surely, 2230820878 is an apocalyptic number.

230820878 is a deficient number, since it is larger than the sum of its proper divisors (115410442).

230820878 is a wasteful number, since it uses less digits than its factorization.

230820878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115410441.

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 230820878 is about 15192.7903296267. The cubic root of 230820878 is about 613.4206091015.

The spelling of 230820878 in words is "two hundred thirty million, eight hundred twenty thousand, eight hundred seventy-eight".

Divisors: 1 2 115410439 230820878