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BaseRepresentation
bin101110001010…
…100100101000
3211202211201120
4232022210220
511044230203
61111215240
7204602406
oct56124450
924684646
1012101928
1169163a3
124077520
132679507
141870476
1510e0b53
hexb8a928

12101928 has 16 divisors (see below), whose sum is σ = 30254880. Its totient is φ = 4033968.

The previous prime is 12101927. The next prime is 12102001. The reversal of 12101928 is 82910121.

It is a super-2 number, since 2×121019282 = 292913322634368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 504247 = 12101928 / (1 + 2 + 1 + 0 + 1 + 9 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 12101898 and 12101907.

It is not an unprimeable number, because it can be changed into a prime (12101927) 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, 252100 + ... + 252147.

It is an arithmetic number, because the mean of its divisors is an integer number (1890930).

Almost surely, 212101928 is an apocalyptic number.

It is an amenable number.

12101928 is an abundant number, since it is smaller than the sum of its proper divisors (18152952).

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

12101928 is a wasteful number, since it uses less digits than its factorization.

12101928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504256 (or 504252 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 12101928 is about 3478.7825456616. The cubic root of 12101928 is about 229.5892353324.

The spelling of 12101928 in words is "twelve million, one hundred one thousand, nine hundred twenty-eight".