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28255941 = 327716317
BaseRepresentation
bin110101111001…
…0011011000101
31222011112212100
41223302123011
524213142231
62445342313
7462112560
oct153623305
958145770
1028255941
1114a4a11a
129567999
135b141bc
143a774d7
1527321e6
hex1af26c5

28255941 has 24 divisors (see below), whose sum is σ = 47309184. Its totient is φ = 15916320.

The previous prime is 28255933. The next prime is 28255951. The reversal of 28255941 is 14955282.

It is not a de Polignac number, because 28255941 - 23 = 28255933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28255896 and 28255905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28255951) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1315 + ... + 7631.

It is an arithmetic number, because the mean of its divisors is an integer number (1971216).

Almost surely, 228255941 is an apocalyptic number.

28255941 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

28255941 is a deficient number, since it is larger than the sum of its proper divisors (19053243).

28255941 is a wasteful number, since it uses less digits than its factorization.

28255941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6401 (or 6398 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 28255941 is about 5315.6317592550. The cubic root of 28255941 is about 304.5813156931.

The spelling of 28255941 in words is "twenty-eight million, two hundred fifty-five thousand, nine hundred forty-one".

Divisors: 1 3 7 9 21 63 71 213 497 639 1491 4473 6317 18951 44219 56853 132657 397971 448507 1345521 3139549 4036563 9418647 28255941