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2028929 = 7289847
BaseRepresentation
bin111101111010110000001
310211002011112
413233112001
51004411204
6111253105
723150150
oct7572601
93732145
102028929
111166401
1281a195
13560666
143ab597
152a126e
hex1ef581

2028929 has 4 divisors (see below), whose sum is σ = 2318784. Its totient is φ = 1739076.

The previous prime is 2028907. The next prime is 2028931. The reversal of 2028929 is 9298202.

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.

It is a cyclic number.

It is not a de Polignac number, because 2028929 - 212 = 2024833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2028895 and 2028904.

It is not an unprimeable number, because it can be changed into a prime (2028329) 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, 144917 + ... + 144930.

It is an arithmetic number, because the mean of its divisors is an integer number (579696).

22028929 is an apocalyptic number.

It is an amenable number.

2028929 is a deficient number, since it is larger than the sum of its proper divisors (289855).

2028929 is an equidigital number, since it uses as much as digits as its factorization.

2028929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289854.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 2028929 is about 1424.4047879729. The cubic root of 2028929 is about 126.5966703143.

The spelling of 2028929 in words is "two million, twenty-eight thousand, nine hundred twenty-nine".

Divisors: 1 7 289847 2028929