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28958944 = 257129281
BaseRepresentation
bin110111001111…
…0000011100000
32000111021012111
41232132003200
524403141234
62512405104
7501101260
oct156360340
960437174
1028958944
111538a313
129846794
135ccc191
143bbb7a0
152820664
hex1b9e0e0

28958944 has 24 divisors (see below), whose sum is σ = 65158128. Its totient is φ = 12410880.

The previous prime is 28958893. The next prime is 28958947. The reversal of 28958944 is 44985982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28958947) 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, 64417 + ... + 64864.

It is an arithmetic number, because the mean of its divisors is an integer number (2714922).

Almost surely, 228958944 is an apocalyptic number.

It is an amenable number.

28958944 is an abundant number, since it is smaller than the sum of its proper divisors (36199184).

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

28958944 is a wasteful number, since it uses less digits than its factorization.

28958944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129298 (or 129290 counting only the distinct ones).

The product of its digits is 829440, while the sum is 49.

The square root of 28958944 is about 5381.3515031077. The cubic root of 28958944 is about 307.0866289921.

The spelling of 28958944 in words is "twenty-eight million, nine hundred fifty-eight thousand, nine hundred forty-four".

Divisors: 1 2 4 7 8 14 16 28 32 56 112 224 129281 258562 517124 904967 1034248 1809934 2068496 3619868 4136992 7239736 14479472 28958944