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128105094 = 23131642373
BaseRepresentation
bin1111010001010…
…11101010000110
322221001102011010
413220223222012
5230243330334
620413423050
73113606145
oct750535206
9287042133
10128105094
1166348287
1236a9aa86
1320704140
141302975c
15b3a70e9
hex7a2ba86

128105094 has 16 divisors (see below), whose sum is σ = 275918832. Its totient is φ = 39416928.

The previous prime is 128105053. The next prime is 128105111. The reversal of 128105094 is 490501821.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 821109 + ... + 821264.

It is an arithmetic number, because the mean of its divisors is an integer number (17244927).

Almost surely, 2128105094 is an apocalyptic number.

128105094 is an abundant number, since it is smaller than the sum of its proper divisors (147813738).

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

128105094 is a wasteful number, since it uses less digits than its factorization.

128105094 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1642391.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 128105094 is about 11318.3520885330. The cubic root of 128105094 is about 504.1063094590.

The spelling of 128105094 in words is "one hundred twenty-eight million, one hundred five thousand, ninety-four".

Divisors: 1 2 3 6 13 26 39 78 1642373 3284746 4927119 9854238 21350849 42701698 64052547 128105094