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28895034 = 237687977
BaseRepresentation
bin110111000111…
…0011100111010
32000101000112110
41232032130322
524344120114
62511153150
7500414040
oct156163472
960330473
1028895034
11153462a3
1298157b6
135ca906c
143ba2390
15280b759
hex1b8e73a

28895034 has 16 divisors (see below), whose sum is σ = 66045888. Its totient is φ = 8255712.

The previous prime is 28895033. The next prime is 28895047. The reversal of 28895034 is 43059882.

It is a happy number.

It is a super-2 number, since 2×288950342 = 1669845979722312, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28894983 and 28895001.

It is not an unprimeable number, because it can be changed into a prime (28895033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 343947 + ... + 344030.

It is an arithmetic number, because the mean of its divisors is an integer number (4127868).

Almost surely, 228895034 is an apocalyptic number.

28895034 is an abundant number, since it is smaller than the sum of its proper divisors (37150854).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28895034 is a wasteful number, since it uses less digits than its factorization.

28895034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687989.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 28895034 is about 5375.4101238882. The cubic root of 28895034 is about 306.8605576527.

The spelling of 28895034 in words is "twenty-eight million, eight hundred ninety-five thousand, thirty-four".

Divisors: 1 2 3 6 7 14 21 42 687977 1375954 2063931 4127862 4815839 9631678 14447517 28895034