Base | Representation |
---|---|
bin | 11101110001001… |
… | …11000010011100 |
3 | 122101220010210111 |
4 | 32320213002130 |
5 | 1002412032423 |
6 | 40440215404 |
7 | 6121410346 |
oct | 1670470234 |
9 | 571803714 |
10 | 249720988 |
11 | 118a63090 |
12 | 6b76a564 |
13 | 3c9756ca |
14 | 25246296 |
15 | 16dcb60d |
hex | ee2709c |
249720988 has 24 divisors (see below), whose sum is σ = 477260784. Its totient is φ = 113385600.
The previous prime is 249720983. The next prime is 249721019. The reversal of 249720988 is 889027942.
249720988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a super-2 number, since 2×2497209882 = 124721143695392288, which contains 22 as substring.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (249720983) 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, 46608 + ... + 51688.
It is an arithmetic number, because the mean of its divisors is an integer number (19885866).
Almost surely, 2249720988 is an apocalyptic number.
It is an amenable number.
249720988 is a deficient number, since it is larger than the sum of its proper divisors (227539796).
249720988 is a wasteful number, since it uses less digits than its factorization.
249720988 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 6213 (or 6211 counting only the distinct ones).
The product of its (nonzero) digits is 580608, while the sum is 49.
The square root of 249720988 is about 15802.5627035617. The cubic root of 249720988 is about 629.7260823147.
The spelling of 249720988 in words is "two hundred forty-nine million, seven hundred twenty thousand, nine hundred eighty-eight".
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